Quiz about Algebra CLASS SBAC Practice for 8th grade

Question 1

Erin is 3 years younger than twice Alex's age. Their ages combined are 33 years. How old are Alex and Erin. If x=Erin's age and y=Alex's age, choose the system that matches the situation.

Accepted Answer

x + y = 33
x = 2y - 3

Answer

x + y = 33
y = 2x - 3

Answer

x + y = 33
x = 3 - 2y

Answer

x + y = 3
x = 33 - 2y

Question 2

What is the relationship between the volume of a cone and cylinder when they both have the same radius and height?

Accepted Answer

The cone is 1/3 the volume of the cylinder.

Answer

The cylinder is 1/3 the volume of the cone.

Answer

They have the same volume.

Answer

Their volumes are not related at all.

Question 3

What type of association does this graph have?

Accepted Answer

negative

Answer

positive

Answer

none

Answer

all of the above

Question 4

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?

Accepted Answer

D. 60 min

Answer

A. 50 min

Answer

B. 80 min

Answer

C. 45 min

Question 5

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

Accepted Answer

18 chapters

Answer

12 chapters

Answer

15 chapters

Answer

21 chapters

Question 6

The number of siblings you have and your weight.

Accepted Answer

No correlation

Answer

Positive correlation

Answer

Negative correlation

Answer

All of the above

Question 7

As x increases, y increases

Accepted Answer

positive correlation

Answer

correlation coefficient

Answer

causation

Answer

negative correlation

Question 8

Find the slope for the trend line using points (2,2) and (4,3)

Accepted Answer

1/2

Answer

2

Answer

-2

Answer

-1/2

Question 9

Which scatter plot shows a linear relationship between x and y?

Accepted Answer

Graph C

Answer

Graph A

Answer

Graph B

Answer

Graph D

Question 10

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 11

Which choice best defines the term "linear function"?

Accepted Answer

An equation that can be written in slope-intercept form

Answer

An equation that is the bomb diggity

Answer

An equation with an exponent in it

Answer

An equation that has a slope but not a y-intercept

Question 12

What is a line of best fit used for?

Accepted Answer

To make predictions

Answer

To make the graph look pretty

Answer

To connect the points

Answer

To make it look like you know what you are doing

Question 13

Students in a group of chess teams submitted data about hours of team practice and the number of matches the team won.  The graph shows the results of the data.  Based on the linear regressions equation y = 3.14x + 3.52, if a team practices 4.5 hours per week next year, which is the best prediction of the number of chess matches a team could expect to win?

Accepted Answer

about 18

Answer

about 24

Answer

about 12

Answer

about 8

Question 14

What is the measure of angle b?

Accepted Answer

36o

Answer

56o

Answer

63o

Answer

117o

Question 15

The formula for the Volume of ...

Accepted Answer

Spheres

Answer

Cones

Answer

Cylinders

Question 16

Find the Volume if the height is 10 cm and radius 3 cm?

Accepted Answer

283

Answer

250

Answer

200

Answer

180

Question 17

You have a globe that has a radius of 11 inches. Find the volume of your globe.

Accepted Answer

5,575 in3

Answer

523 in3

Answer

16,717 in³

Answer

7,235 in3

Question 18

Mike created a cone that has a diameter of 8 feet and a height of 3 feet. Find the volume of this cone.

Accepted Answer

50.24 ft3

Answer

150.72 ft³

Answer

not here

Answer

192.65 ft³

Question 19

The school that Stefan goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 3 senior citizen tickets and 1 child ticket for a total of $38. The school took in $52 on the second day by selling 3 senior citizen tickets and 2 child tickets. Which equations represents the system that could be used?

Accepted Answer

3s + 1c = 38
3s + 2c = 52

Answer

1s + 3c = 38
2s + 3c = 52

Answer

s + c = 38
s + c = 52

Answer

3s + 3c = 38
1s + 2c = 52

Question 20

Solve for  y.

Accepted Answer

y = 10

Answer

y = 20

Answer

y = 120

Answer

y = 60

Question 21

Name the angle relationship.

Accepted Answer

Corresponding

Answer

Alternate Interior

Answer

Alternate Exterior

Answer

Vertical Angles

Question 22

Name the angle relationship.

Accepted Answer

Vertical Angles

Answer

Alternate Interior

Answer

Alternate Exterior

Answer

Corresponding

Question 23

Name the angle relationship.

Accepted Answer

Alternate Interior

Answer

Alternate Exterior

Answer

Corresponding

Answer

Vertical Angles

Question 24

Name the angle relationship.

Accepted Answer

Linear Pairs

Answer

Same Side Interior

Answer

Alternate Interior

Answer

Vertical Angles

Question 25

Solve for x and y.
y = 2/3x - 2
y = -x + 3

Accepted Answer

(3,0)

Answer

(0,3)

Answer

(0,-3)

Answer

(-3,0)

Question 26

Solve for x and y
y = 2x + 1
y = 4x - 1

Accepted Answer

(1,3)

Answer

(-1,-3)

Answer

(-1,3)

Answer

(3,1)

Question 27

What is the equation of the line of best fit?

Accepted Answer

f(x)= 1.82x + 5.02

Answer

f(x)= 5x+1.82

Answer

cannot be determined

Answer

f(x)= 1.1x + 4.2

Question 28

Question 28.

Accepted Answer

150 turtles

Answer

440 turtles

Answer

40 turtles

Answer

90 turtles

Algebra CLASS SBAC Practice for 8th grade

37 questions

Erin is 3 years younger than twice Alex's age. Their ages combined are 33 years. How old are Alex and Erin. If x=Erin's age and y=Alex's age, choose the system that matches the situation.

What is the relationship between the volume of a cone and cylinder when they both have the same radius and height?

What type of association does this graph have?

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

The number of siblings you have and your weight.

As x increases, y increases

Find the slope for the trend line using points (2,2) and (4,3)

Which scatter plot shows a linear relationship between x and y?

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

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