Unit Two: Quiz One

To make the same shade of gray, how many cups of white paint will they need to mix with 1 cup of black paint?

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How many cups of black paint will they need to mix with 16 cups of white paint?

• 2 cups

• 4 cups

• 8 cups

• 16 cups

What is the constant of proportionality?

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What does the constant of proportionality mean in this situation?

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Mr. Garcia is riding his bike around the neighborhood as he does every Saturday morning. He completes 5 laps in 20 minutes. Complete the given table.

• 40, 44, 4, 4x

• 50, 55, 5, 5x

• 60, 66, 6, 6x

• 70, 77, 7, 7x

2a. Write an equation that shows the time in minutes it takes Mr. Garcia to complete x laps at the same pace.

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If a situation describes a constant rate, it can often be written as a proportional relationship in the form of _________________

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4. A car travels 150 miles in 3 hours. What is the constant of proportionality for the speed?

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If the constant of proportionality is 5, and you have y = kx, what does the constant of proportionality mean in the context?

• For every 5 units of x, there are 5 units of y

• For every 1 unit of x, there are 5 units of y

• For every 5 units of y, there are 1 unit of x

• For every 5 units of x, there are 0 units of y

6. A babysitter earns $10 per hour of work. Write an equation that shows the relationship between y, the total earnings and x, the number of hours?

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