Scale Factor and Proportional Relationships

Front

What is the formula for scale factor?

Back

Front

A picture of a school’s mascot is 18 in. wide and 24 in. long. It is enlarged proportionally to banner size. If the width is enlarged to 54 in., what is the length of the banner?

Back

72 in

Front

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

Back

12 feet

Front

Find the unit rate: $3.60 for 3 pounds of apples. How much does it cost for 1 pound of apples?

Back

$1.20 per pound

Front

Noah printed 24 photos in 8 minutes. How many photos did he print per minute?

Back

3 photos/minute

Front

What is a proportional relationship?

Back

A relationship where two quantities maintain a constant ratio.

Front

How do you find the unit rate from a ratio?

Back

Divide the first quantity by the second quantity.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the scale factor if you want to use 4 cups of flour?

Back

Scale factor is 2.

Front

What does it mean to enlarge an image proportionally?

Back

To increase the size of an image while maintaining the same ratio of width to height.

Front

If a map has a scale of 1 inch:10 miles, how far is 5 inches on the map in real distance?

Back

50 miles