Math8 STAAR Review (8 questions) Set 9

[RC2] 8.4(B)

Ricardo can complete 4 laps around a track in 12 minutes. Create a graph that has a slope that represents the number of laps Ricardo can run per minute.

Select TWO points on the coordinate grid by drag and drop. A line will connect the points.

Answer explanation

Tags

8.4.B

Tags

8.2.B

[RC2] 8.5(G)

Which sets of ordered pairs represents y as a function of x ?

• { (0, 0), (- 1, 3), (- 1,- 2), (- 2, 4), (- 2,- 4) }

• { (0, 0), (1, 1), (2, 4), (3, 9), (3, 6) }

• { (0, 0), (0, 1), (0, 2), (0,- 1), (0,- 2) }

• { (0, 0), (- 1,-0.5), (- 2,- 1), (- 3,- 1.5), (- 4,- 2) }

• { (0, 0), (1, 3), (2, 6), (3, 9), (4, 12) }

Answer explanation

[RC2] 8.5(G)

Remember - in order for it to BE a FUNCTION - ALL of the X-values MUST be DIFFERENT!

Focus on just the x-coordinate in each ordered paired. If an x-value repeats, then it is NOT a Function.

Tags

8.5.G

[RC3] 8.7(B)

A can in the shape of a cylinder has a diameter of 6 centimeters and a height of 10 centimeters. Which measurement is closest to the total surface area of the can in square centimeters?

• 603.19 cm³

• 245.04 cm³

• 376.99 cm³

• 188.50 cm³

Tags

8.7.B

Mathematical Equivalence

ON

Answer explanation

[RC2] 8.8(A)

Notice looking for

SELL > cost

Find the key word for rate and if it also has a matching starting amount.

cost: rate = $1.50 /start = $9.00

and

sell: rate = $2.75/ start = $0

Then make sure the

cost is LESS than sell

OR the REVERSE

sell is MORE than cost

Tags

8.8.A

• is between 0 and 1
• smaller than
• is greater than 1
• congruent to

Answer explanation

[RC3] 8.3(C)

Scale factor changes the size of the dilation.

k > 1 when multiplying makes the number BIGGER which is an enlargement.

If k is a fraction <1 when multiplying makes the number smaller which is a reduction.

Only a k = 1 (multiply by 1) would make it congruent.

Tags

8.3.C

[RC4] 8.12(D)

Mr. Jenkins deposited $1,250 into an account that earns 4.75% compound interest annually. He made no additional deposits or withdrawals.

How much interest will Mr. Jenkins’ account earn in dollars and cents at the end of 4 years?

Enter your answer in the box.

Mathematical Equivalence

ON

Tags

8.12.D

• 1.25
• 7.5
• 3.75
• 2.5

Answer explanation

[RC3] 8.6(A)

Remember for the Volume of a Cylinder you must substitute in the formula for the area of a circle for B.

V = Bh = (πr²)h

Notice that DIAMETER is given - not radius. Need to

r = d ÷ 2

Tags

8.6.A