Scaling Quantities

Recipe calls for 4 cups concentrate and 5 cups water:
160 people going to camp.  How many batches do you need to guarantee everyone gets 1 cup of juice.

• 17 batches

• 15 batches

• 18 batches

• 10 batches

A number used to make comparisons between 2 quantities is a...

• equation

• ratio

• part to part

• proportion

There are 75 Sour Patch Kids in a 15 oz bag. Which proportion is written correctly so that you can find the number of Sour Patch Kids in a 7 oz bag?

• A

• B

• C

What is the constant of proportionality?

• $3

• $4

• $2

• $9

Solve the proportion.

• q=2

• q=9

• q=4.5

• q=6

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

What is the constant of proportionality for this table.

• 18

• 18.50

• 22.50

• 22

Justin measured a house and its lot and made a scale drawing. The scale of the drawing was 5 inches = 3 feet. If the backyard is 80 inches in the drawing, how long is the actual yard?

• 21 feet

• 48 feet

• 66 feet

• Whale

Find the unit rate.
Carrie can type 800 words in 12 minutes. How many words can she type per minute? 

• 66 ^2_/3

• 66

• 66 ^1/₂

To make equivalent ratios larger in size, or amount by multiplying.

• scaling up

• scaling down