Topic 2 Form B Assessment Practice (Savvas)

The equation y=4.5x represents a proportional relationship. What is the constant of proportionality?

• 4.5

• x

• y

The table shows the number of green and purple beads Mia used to make 5 different picture frames. Are the number of green and purple beads proportional? Write an equation that relates the number of purple beads, p, to the number of green beads, g.

Are the number of green and purple beads in Riley's picture frame proportional? How do you know?

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What is the constant of proportionality and what does it mean in this situation?

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What does the ordered pair (40, 6,000) represent?

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• 0.05 cup

• 0.1 cup

• 0.375 cup

• 0.475 cup

The water pump for a swimming pool can move 166.5 gallons of water in 3 minutes. The number of gallons, g, is proportional to the number of minutes, m, that the pump operates. Select the two equations that represent the relationship between g and m. (Think of y=kx being the same as g=km) The ratio is gallons per minute.

• g=55.5m

• g=0.02m

A grocery store manager uses 1/2 crate of apples for every 3/4 crate of oranges in a fruit display. How many crates of oranges will she need if she uses 2 1/2 crates of apples? Draw and complete a table to answer the questions.

At the local bookstore, Jim bought 2 books for $13.00. Maria bought 5 books for $32.50. Tanya bought 7 books for $45.50. Do the number of books and the cost have a proportional relationship?