Proportions and Rate of Change

Q1. What is the result of 8 + 4?

• 1) 8

• 2) 9

• 3) 72

• 4) 12

Select all ratios equivalent to 4 to 7.

• 20 to 35

• 24 to 40

• 12 to 22

• 2 to 3

For a recipe, Brutus uses 4 cups of sugar for every 5 cups of flour. Which of the following show equivalent ratios for sugar to flour?

• 4/5=8/10 =12/15

• 4/5 = 5/6 = 6/7

• 4/5 = 3/4 = 2/3

• 4/5=8/15=16/45

Which ratio is equivalent to 12:20

• 20:12

• 2:3

• 3:5

• 3:10

At a bus station, busses depart at a rate of 3 every 10 minutes. At this rate, how many busses would depart in one hour?

• 3 busses

• 10 busses

• 13 busses

• 18 busses

Solve:

• -9

• -28

• 9

• 4

Ms. Scott receives a basket of apples at her door every Friday morning.  Last Friday, there were 5 apples in the basket.  This Friday, there were 8 apples in the basket.  What is the percent of increase in the number of apples in the basket?

• 38%

• 63%

• 60%

• 167%

A $30 pair of jeans is on sale for $15. What is the percent of change for the pair of jeans?

• 10%

• 15%

• 25%

• 4%

Change 32% into a decimal.

• 32

• 3.2

• .32

• .032

12 ounce shampoo bottle lasts Mike 16 weeks.  How long would you expect an 18-ounce bottle of the same brand to last him?

• 24 weeks

• 6 weeks

• 30 weeks

• 20 weeks