PRACTICE 8TH GRADE STAAR

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 sphere and its dimension are shown in the diagram.

• F

  1,325.4 in.3

• G

  188.5 in.3

• H

  94.2 in.3

• J

  1,767.1 in.3

Which ordered pair represents a solution to both equations?

• A

  (-4,0)

• B

  (-3 ,3)

• C

  (3, -3)

• D

  (0, 4)

Which proportion must be true?

• 
• 
• 
• 

5. Which graph represents y as a function of x?

• 
• 
• 
• 

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?

• 
• 
• 
• 

7) 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 gallons per minute.

After how many minutes will both aquariums contain the same amount of water?

• A

  148 min

• B

  125 min

• C

  25 min

• D

  50 min

8) 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?

• F

  9ft

• G

  17 ft

• H

  12.4 ft

• J

  13.6 ft

What is the slope of PV?

Which rule best describes this transformation?

• 
• 
• 
•