Exploring Circles and Rates Quiz

A circle has a radius of 5 cm. What is the formula used to calculate the circumference of a circle?

• C = π r²

• C = 2π r

• C = π d²

• C = (1/2)π r

Tags

TEKS.7.9.B

What is the unit rate if a car travels 180 miles in 3 hours?

• 45 miles per hour

• 90 miles per hour

• 60 miles per hour

• 30 miles per hour

Tags

TEKS.7.4.B

What is the area of a circle with a diameter of 10 cm? Use π ≈ 3.14.

• 31.4 cm²

• 78.5 cm²

• 314 cm²

• 62.8 cm²

Tags

TEKS.7.9.B

A store sells 5 notebooks for 8.75$. What is the unit price per notebook?

• 1.50$

• 1.85$

• 1.75$

• 2.00$

Tags

TEKS.7.4.B

What is the constant of proportionality in the equation y = 7x?

• x

• 7

• y

• 1/7

Tags

TEKS.7.4.C

A circular garden has a radius of 7 meters. What is the circumference of the garden? Use π ≈ 3.14.

• 43.96 m

• 21.98 m

• 153.86 m

• 87.92 m

Tags

TEKS.7.9.B

The table below shows the relationship between x and y. Determine the constant of proportionality.

• k = 2

• k = 8

• k = 5

• k = 4

Tags

TEKS.7.4.C

A car travels at a constant speed. The graph of the car's distance over time passes through the points (2, 90) and (4, 180). What is the constant rate of change?

• 30 miles per hour

• 60 miles per hour

• 45 miles per hour

• 90 miles per hour

Tags

TEKS.7.4.A

A circular pizza has a diameter of 14 inches. What is the area of the pizza? Use π ≈ 3.14.

• 43.96 in²

• 615.44 in²

• 153.86 in²

• 87.92 in²

Tags

TEKS.7.9.B

The table below shows a proportional relationship between x and y. Which equation represents this relationship?

• y = 3x

• y = 12x

• y = 5x

• y = 6x

Tags

TEKS.7.4.C