2019 8th grade released STAAR Test

Oscar buys his lunch in the school cafeteria. The cost of 15 school lunches is $33.75. Which graph has a slope that best represents the average cost of the lunches in dollars per lunch?

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

A sphere and its dimension are shown in the diagram. 15 in. Which measurement is closest to the volume of the sphere in cubic inches?

• F

• G

• H

• J

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

The two lines graphed on the coordinate grid each represent an equation. Which ordered pair represents a solution to both equations?

• (-4,0)

• (-3,3)

• (3,-3)

• (0,4)

Tags

CCSS.8.EE.C.8B

Figure I and Figure II are similar figures. Which proportion must be true?

• F

• G

• H

• J

Tags

CCSS.HSG.SRT.A.2

Which graph represents y as a function of x?

• A

• B

• C

• D

A polygon will be dilated on a coordinate grid to create a smaller polygon. The polygon is dilated using the origin as the center of dilation. Which rule could represent this dilation?

• (x y, ) ---> (0.5 - x, 0.5 - y)

• (x y, )  ---> (x - 7, y - 7)

• ( X, y)  ----> (  $\frac{5}{4}$   x,  $\frac{5}{4}$   y) 

• (x y, ) ---> (0.9x, 0.9y)

Tags

CCSS.8.G.A.3

Aquarium I contains 4.6 gallons of water. Louise will begin filling Aquarium I at a rate of 1.2 gallons per minute. Aquarium II contains 54.6 gallons of water. Isaac will begin draining Aquarium II at a rate of 0.8 gallon per minute. After how many minutes will both aquariums contain the same amount of water?

• 148 MIN

• 125 min

• 25 min

• 50 min

Tags

CCSS.8.EE.C.8C

The width of a rectangle is 4 feet, and the diagonal length of the rectangle is 13 feet. Which measurement is closest to the length of this rectangle in feet?

• 9

• 17

• 12.4

• 13.6

Tags

CCSS.8.G.B.8

Triangle PSV is shown on the coordinate grid. The coordinates of each vertex of the triangle are integers. What is the slope of PV? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

• -4

• -1/4

• 4

• 1/4

Tags

CCSS.8.EE.B.6

Triangle ABC was transformed to create triangle A'B'C'. Which rule best describes this transformation?

• ( x ,y) ---> (x ,y - 7)

• ( x ,y) ---> (x ,-y)

• ( x ,y) ---> (x-7 ,y)

• ( x ,y) ---> (-x ,y )

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5