Proportions

What percentage of these customers bought a purple shirt?

• 52%

• 67%

• 56%

• 48%

The owner of a flower shop buys used vases from customers for $2.50 each. The owner then resells the vases for 300% of the amount she paid for them.

What is the price of a used vase in the flower shop?

1. A quality inspector inspects a random box of 50 tablets. 

He discovers 2 are defective.

In an order of 2,000 tablets, how many are likely to be defective?

Tags

7.4.D

If Mrs. Armstrong’s class contains 16 girls, how many boys are there in the class?

• 27 boys

• 30 boys

• 36 boys

• 28 boys

Tags

7.4.D

1. A recipe for dessert requires 3 cups of strawberries for every 1 ½ cups of yogurt used. 

At this rate, how much yogurt should be used if 2 cups of strawberries are used?

• 1 cup

• 9 cups

• ¾ cups

• ½ cups

Tags

7.4.D

At a concession stand 6 hot dogs cost $6.72. 

At this rate, how much would 8 hot dogs cost, in dollars and cents?

Tags

7.4.D

What makes a graph proportional?

• Straight line

• The line goes through the origin

• Curvy line

• Straight line and the line goes through the origin

Write an equation for the proportional relationship in the table.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

Identify the constant of proportionality.

• k = 25

• k = 50

• k = 100

• k = 1/50

• none (not proportional)

Which graph is non-proportional?

• A

• B

• C

• D