Proportions Review

Mr. Tubbs baked chocolate chip cookies for a bake sale. The graph shows the relationship between the number of cookie batches baked and the number of cups of chocolate chips used.

What does the constant of proportionality represent?

• The total number of cookie batches baked

• The total number of cups of chocolate chips used

• The number of cookie batches per cup of chocolate chips used

• The number of cups of chocolate chips used per cookie batch

Norshaura has a recipe that requires 3/4 teaspoons of butter for every 2 cups of milk. If Norshaura uses 3 cups of milk, how many teaspoons of butter are needed?

• 1 1/8 teaspoons

• 1/2 teaspoons

• 1 3/8 teaspoons

• 7/8 teaspoons

The ratio of dogs to cats at the animal shelter is 4:1. If there are a total of 85 dogs and cats at the shelter, how many dogs are at the shelter?

• 17 dogs

• 51 dogs

• 68 dogs

• 72 dogs

Which rate is NOT equivalent to the others?

• 4 for $1.00

• 6 for $1.50

• 10 for $2.00

• 12 for $3.00

Mrs. Watson wants to purchase some apples. She compared prices from several different online grocers. Which grocer's price table is based on a constant unit price?

• Groceries 2 U

• The Dotted Grocer

• The Market

• Web Grocer

The price of peaches at Ethan's supermarket can be determined by the equation p=0.28n, where P is the price and n is the number of pounds of peaches. What is the constant of proportionality?

• $0.56/2 pounds

• $1/pound

• $0.28/pound

• $1.50/3 pounds

• There is no constant of proportionality because the price of peaches is not directly proportional to the weight of the peaches.

The graph shows the relationship between the cost of peaches and plums, and the number of pounds purchased. Which of the following statements are true? (Select all the true statements)

• The unit cost of peaches is greater than the unit cost of plums.

• The unit cost of plums is greater than the unit cost of peaches.

• The cost of peaches and plums is not proportional to the purchased.

• The cost of peaches and plums is proportional to the weight purchased.

Are they proportional?

• Yes

• No

Are they proportional?

• Yes

• No

Solve the proportion.

• x = 8

• x = 2.4

• x = 5

• x = 1.6