Quiz about 2018 STAAR 8th Grade Math Test

Question 1

Four plumbers estimated the length of the radius of a cylindrical pipe. The estimates made by the plumbers are listed. - Plumber W estimated that the radius had a length of (3/25) inches. - Plumber X estimated that the radius had a length of (sqrt(3/11)) inches. - Plumber Y estimated that the radius had a length of (9/100) inches. - Plumber Z estimated that the radius had a length of (pi/24) inches. Which list shows these lengths in order from greatest to least?

Accepted Answer

(sqrt(3/11)), (pi/24), (3/25), (9/100)

Answer

(9/100), (pi/24), (3/25), (sqrt(3/11))

Answer

(9/100), (3/25), (pi/24), (sqrt(3/11))

Answer

(sqrt(3/11)), (3/25), (pi/24), (9/100)

Question 2

Jerry has a new job and earns a salary of $45,000. Victoria has a new job and earns a salary of $54,000. Jerry will receive a salary increase of $2,500 per year, and Victoria will receive a salary increase of $1,500 per year. Which equation can be used to find x, the number of years it will take Jerry to earn the same salary as Victoria?

Accepted Answer

45,000 + 2,500x = 54,000 + 1,500x

Answer

45,000x + 2,500x = 54,000x + 1,500

Answer

45,000 + 2,500 = 54,000x + 1,500

Answer

45,000x + 2,500x = 54,000x + 1,500x

Question 3

A relation contains the points (1, 2), (2, -1), (3, 0), (4, 1), and (5, -1). Which statement accurately describes this relation?

Accepted Answer

The relation represents y as a function of x, because each value of x is associated with a single value of y.

Answer

The relation does not represent y as a function of x, because each value of x is associated with a single value of y.

Answer

The relation represents y as a function of x, because one value of y is associated with two values of x.

Answer

The relation does not represent y as a function of x, because each value of y is associated with two values of x.

Question 4

Julie started with 20 pieces of gum and gave away x pieces. Conrad started with 35 pieces of gum and gave away twice as many pieces as Julie did. How many pieces of gum did Julie give away if they had the same number of pieces of gum left?

Accepted Answer

15

Answer

18

Answer

5

Answer

8

Question 5

Which function is best represented by this graph?

Accepted Answer

y = 4x + 8

Answer

y = 1/4x + 8

Answer

y = 1/4x - 2

Answer

y = 4x - 2

Question 6

An employee put $5,000.00 in a retirement account that offers 9% interest compounded annually. The employee makes no additional deposits or withdrawals. Which amount is closest to the interest the employee will have earned at the end of 5 years?

Accepted Answer

$2,693.12

Answer

$229.09

Answer

$450.00

Answer

$2,250.00

Question 7

In each diagram, line k is parallel to line l, and line t intersects lines k and l. Based on the diagrams, which statement is true?

Accepted Answer

The value of x is 101, because the two angles shown in each diagram are supplementary.

Answer

The value of x is 79, because the two angles shown in each diagram are congruent.

Answer

The value of x is greater than 90, because the two angles shown in each diagram are obtuse angles.

Answer

The value of x is 11, because the two angles shown in each diagram are complementary.

Question 8

A hot-air balloon is released at ground level, and it rises into the air at a constant rate. After 5 seconds the height of the balloon is 20 feet. The balloon continues to rise at the same rate. Which table shows the relationship between the time in seconds, x, and the height of the balloon in feet, y?

Accepted Answer

Table H

Answer

Table F

Answer

Table G

Answer

Table J

Question 9

Which Venn diagram correctly represents the relationship between rational numbers and irrational numbers?

Accepted Answer

Venn diagram showing rational numbers and irrational numbers as two overlapping circles within a rectangle labeled 'Real numbers,' because some irrational numbers are also rational numbers.

Answer

Venn diagram showing rational numbers and irrational numbers as two non-overlapping circles within a rectangle labeled 'Real numbers,' because rational numbers and irrational numbers have no numbers in common.

Answer

Venn diagram showing a circle labeled 'Irrational numbers' within a larger circle labeled 'Rational numbers,' both within a rectangle labeled 'Real numbers,' because all rational numbers are also irrational numbers.

Answer

Venn diagram showing a circle labeled 'Rational numbers' within a larger circle labeled 'Irrational numbers,' both within a rectangle labeled 'Real numbers,' because all irrational numbers are also rational numbers.

Question 10

Rudolfo has 15 toys in his toy box, and he adds 2 new toys every month. Based on this information, which representation best shows this relationship between the number of toys Rudolfo has in his toy box, y, and the number of months that have passed, x?

Accepted Answer

Representation with the graph showing a linear increase starting at 15 and ending at 35 over 10 months

Answer

Representation F

Answer

Representation H

Answer

Representation with the graph showing a linear increase starting at 17 and ending at 187 over 10 months

Question 11

A gym charges a membership fee plus an additional fee per yoga class. The table shows the linear relationship between the number of yoga classes taken and the total cost including the membership fee.

Accepted Answer

The additional fee per yoga class is $3.75.

Answer

The additional fee per yoga class is $8.25.

Answer

The membership fee is $35.00.

Answer

The membership fee is $42.50.

Question 12

The list shows the heights of 6 students in inches. 63, 70, 68, 73, 58, 67. What is the mean absolute deviation for these numbers?

Accepted Answer

4

Answer

24

Answer

66.5

Answer

67.5

Question 13

An investor puts $2,500 into a life insurance policy that pays 8.5% simple annual interest. If no additional investment is made into the policy, how much accumulated interest should the investor expect at the end of 10 years?

Accepted Answer

$2,125.00

Answer

$21,250.00

Answer

$212.50

Answer

$21.25

Question 14

Which statement about the volumes of the cone and the cylinder is true?

Accepted Answer

The volume of the cylinder is about 377 cubic inches greater than the volume of the cone.

Answer

The volume of the cylinder is about 377 cubic inches less than the volume of the cone.

Answer

The volume of the cylinder is about 25 cubic inches greater than the volume of the cone.

Answer

The volume of the cylinder is about 25 cubic inches less than the volume of the cone.

Question 15

Which situation can be represented by this equation? 7x + 1 = 10x

Accepted Answer

Brody ran at a constant rate of 7 miles per hour in a race. Candice ran at a constant rate of 10 miles per hour in a race and started 1 mile in front of the starting point. What is x, the number of hours that Brody and Candice would have to run in order for their distance to be the same?

Answer

Brody played a game where he scored 8 points per hour. Candice played the game and scored 10 points per hour. What is x, the number of hours that Brody and Candice would each have to play the game in order for their scores to be the same?

Answer

Brody went to two different amusement parks. The first park charged $7 per hour and gave a 1% discount for showing a student ID. The other park charged $10 per hour. What is x, the number of hours that Brody would have to stay at each park to have to pay the same amount?

Answer

Brody rode his bicycle on two different days. The first day he rode 7 miles per hour and started 1 mile from his house. The second day he started from his house and rode 10 miles per hour. What is x, the number of hours that Brody would have to ride his bicycle to travel the same distance on both days?

Question 16

The coordinates of the endpoints of QR are Q (8, 2) and R (5, 7). Which measurement is closest to the length of QR in units?

Accepted Answer

5.8 units

Answer

5 units

Answer

4 units

Answer

3.9 units

Question 17

The ticket sales for a concert started at 4:00 P.M. The table shows the linear relationship between the number of tickets remaining and the number of hours since 4:00 P.M. Which function can be used to find y, the number of tickets remaining x hours since 4:00 P.M.?

Accepted Answer

y = -3,000x + 12,000

Answer

y = 3,000x + 12,000

Answer

y = 3,000x + 15,000

Answer

y = -3,000x + 15,000

Question 18

A square with a perimeter of 20 units is graphed on a coordinate grid. The square is dilated by a scale factor of 0.4 with the origin as the center of dilation. If (x, y) represents the location of any point on the original square, which ordered pair represents the coordinates of the corresponding point on the resulting square?

Accepted Answer

(0.4x, 0.4y)

Answer

(20x, 20y)

Answer

(x + 20, y + 20)

Answer

(x + 0.4, y + 0.4)

Question 19

Which situation could NOT represent a proportional relationship?

Accepted Answer

The weight in x weeks of a puppy that gains 2 pounds per week if its starting weight is 8 pounds

Answer

The number of gallons of water in x barrels with 42 gallons of water in each barrel

Answer

The amount an employee who makes $8.50 per hour earns in h hours

Answer

The cost of purchasing p pounds of bananas for $0.55 per pound

Question 20

The dimensions of a rectangular piece of paper are 8.5 inches and 11 inches. Veronica folded the piece of paper along its diagonal. Which measurement is closest to the length of the diagonal in inches?

Accepted Answer

19.5 in.

Answer

6.24 in.

Answer

6.98 in.

Answer

13.9 in.

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