2019 8th Grade STAAR review

Which equation is proportional?

• y=5x+1

• y=4x-3

• y=7x

• y=2x+7

Tags

CCSS.8.EE.B.5

CCSS.8.F.A.3

A fishbowl shaped like a sphere is filled with water. The fishbowl has a diameter of 17 meters. Which measurement is closest to the volume of water in the fishbowl in cubic meters?

• 2572.44 m³

• 1929.33 m³

• 302.64 m³

• 3142.77 m³

Jerry has a new job and earns a salary of $20,000. Lavona has a new job and earns a salary of $13,000. Jerry will receive a salary increase of $1,000 per year, Lavona will receive a salary increase of $8,000 per year.

Which equation can be used to find x, the number of years it will take Lavona to earn the same as Jerry?

• 20,000x + 1,000 = 13,000x + 8,000

• 20,000 + 1,000x = 13,000 + 8,000x

• 20,000x + 8,000 = 13,000x + 1,000

• 20,000 + 8,000x = 13,000 + 1,000x

Nate walked from the library to the grocery store and then to his house. The diagram shows the top view of the locations of these three places.

Which measurement is closest to the shortest distance in miles from Nate's house to the grocery store?

• 3.3 mi

• 5.9 mi

• 2.6 mi

• 10.8 mi

In a museum there is a sculpture in the shape of a cylinder. The cylinder has a diameter of 8 feet and height of h feet, Which equation can be used to find V, the volume of the cylinder in cubic feet?

• V = π(4)²h

• V = π(8)²h

• V = π(4h)²

• V = π(8h)²

Trapezoid PQRS is rotated 180° about the orgin to form P'Q'R'S'.

Which statement is true?

• The sum of the angles measures of trapezoid PQRS is 180° less than the sum of the angle measures of trapezoid P'Q'R'S'.

• Trapezoid PQRS is not congruent to trapezoid P'Q'R'S'.

• The area of trapezoid PQRS is less than the area of trapezoid P'Q'R'S'.

• The angle measures of trapezoid PQRS are equal to the corresponding angle measures of trapezoid P'Q'R'S'.

Brody played a game where he scored 8 points per hour but was already up by 6 points. Candice played a game and scored 10 points per hour but was already up by 2 points. 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?

• 8x + 6 = 10x + 2

• 6x + 8 = 2x + 10

• 8x + 2 = 10x + 6

• 6x + 2 = 10x + 6

The coordinates of two points is (1,1) and (3,4).

Which measurement is closest to the length of FM in units?

• 13 units

• 3.6 units

• 2.2 units

• 4.1 units

Which situation could NOT represent a proportional relationship?

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

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

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

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

Which representation shows y as a function of x?

• A

• B

• C

• D