Ratios and Proportions Study Guide

The table shows the relationship between the wait time in minutes and the number of people in line. What is the constant of proportionality (unit rate)?

Carter is buying cupcakes for his class party. He purchased 36 cupcakes for $18.72. Which expression could Carter use to determine the cost of 1 cupcake?

• 36 ÷ $18.72

• $18.72 ÷ 36

• $18.72 * 36

• 36 * $18.72

The costs of different sized jars of Grandma Betty’s Top Secret organic spaghetti sauce are listed below. Which jar costs the least per ounce?

• 10 oz jar for $11.56

• 16 oz jar for $17.60

• 32 oz jar for $35.84

George has a box of pencils. In the box 315of the pencils have been sharpened. Circle the THREE ratios that are proportional to the fraction of sharpened pencils in George’s box.

• 1/3

• 1/5

• 5/25

• 30/6

• 6/30

When two ratios are equal they are .

(a)  

• Proportional

• Ratio

• Rate

• Unit Rate

Two quantities are ​ (a)   if the ratios comparing them are equivalent.

• proportional

• nonproportional

• constant of proportionality

• proportion

Two quantities are in a ​ (a)   if the two quantities vary and have a constant ratio between them.

• proportional relationship

• proportional

• unit rate

• nonproportional

• constant of proportionality

At the shelter for every two dogs, there are about eight cats. If there are a total of 210 cats and dogs at the shelter, predict the number of dogs.

A 24-ounce package of Hershey's kisses contains 96 pieces. How many pieces would you expect in a 60-ounce package?

A recipe for making 3 dozen muffins required 2.25 cups of flour. At this rate, how many cups of flour are required to make 4 dozen muffins.