Scale Factors
A rectangle is 4 cm long. The scale factor is 3. What is the new length?
12 cm
A map uses 1 inch = 5 miles. Two cities are 3 inches apart. How far apart are they?
15 miles
A car travels 180 miles in 3 hours. What is the unit rate?
60 Miles per hour
What does a scale factor greater than 1 do to a figure?
Enlarges it
A drawing is enlarged by a scale factor of 2.5. A side is 6 cm. What is the new side length?
15 cm
A floor plan uses 1 cm = 2 feet. A room is 6 cm long on the plan. How long is the real room?
12 feet
5 notebooks cost $15. What is the cost per notebook?
$3
What does a scale factor between 0 and 1 do to a figure?
Reduces/shrinks it
A side changes from 8 cm to 12 cm. What is the scale factor?
1.5
A model car is made at a scale of 1:20. The real car is 4 meters long. How long is the model?
0.2 m (20 cm)
A runner goes 2.4 miles in 20 minutes. What is the rate in miles per minute?
.12 miles/minutes
If 3 cm on a drawing represents 12 m, how many meters does 1 cm represent?
4 m
A figure has a side length of 18. It is reduced to 6. What is the scale factor?
1/3
On a map, 1 cm represents 8 km. A road is 6.5 cm long. What is the actual distance?
52 km
A machine makes 72 parts in 6 minutes. At the same rate, how many parts in 15 minutes?
180 parts
A 10 cm by 6 cm rectangle is enlarged by a factor of 2. What are the new dimensions?
20 cm by 12 cm
A shape is enlarged by a scale factor of 1.75. A side was 16 cm. What is the new length?
28 cm
A drawing is 7.5 cm wide. The scale is 1 cm = 4 feet. What is the actual width?
30 feet
A store sells 8 pounds of fruit for $14. What is the price per pound?
$1.75 per pound
A map has a scale of 1 inch = 12 miles. A route is 4.25 inches. How many miles is the route?
51 miles