Ratios and Proportions Quick Check

Which of these describes the unit rate?

• a unit of measure

• a fraction with a numerator of one

• a fraction with a denominator of one

• a proportion

Find the unit rate of 40 meters in 16 seconds

• 0.4 meters per second

• 0.4 seconds per meter

• 2.5 meters per second

• 640 meters per second

Josh bought a pizza with eight slices of pizza for $12. What is the cost of a slice of pizza?

• $12

• $1.50

• $3

• $1

A bus traveled 150 miles in 3 hours. At what average rate did the bus travel?

• 150 miles per hour

• 75 miles per hour

• 50 miles per hour

• 450 miles per hour

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

Does this graph represent a proportional relationship?

• No, because it doesn't pass through the origin.

• Yes, because it doesn't pass through the origin.

• Yes, because it intersects the y axis.

• No, because it intersects the x axis.

Select all the graphs that represent a proportional relationship between x and y.

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Select all tables that represent a proportional relationship between x and y.

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PE teachers need volleyballs and basketballs for practice. The ratio of volleyballs to basketballs is 9:12. Select all the statements that are correct about the balls.

• The ratio of basketballs to volleyballs is 4:3.

• The ratio of basketballs to volleyballs is 12:9.

• There are always 3 fewer volleyballs.

• The ratio of volleyballs to basketballs is 18:24.

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk

• 1.75 cups milk

• 2 cups flour

• 2.25 cups milk