Direct vs Inverse Proportion

The number of centimeters y in a linear measurement varies directly with the number of inches x in the measurement. Pablo's height is 167.64 centimeters or 66 inches. What is Maria's height in centimeters if she is 63 inches tall?

• Direct Variation

• Inverse Variation

Kendra earns $32.50 for working 7 hours. If the amount m she earns varies with h the number of hours she works, how much will she earn for working 12 hours?

• Direct Variation

• Inverse Variation

On a scale drawing, 2 feet represents 30 yards. How many yards are represented by 3 feet?

• Direct Variation

• Inverse Variation

8.On a map, 180 miles are represented by 4 inches. How many miles are represented by 6 inches?

• Direct Variation

• Inverse Variation

9.The number of hours required to do a job varies inversely as the number of people working. It takes 8 hours for 4 people to paint the inside of a house. How long would it take 5 people to do the job?

• Direct Variation

• Inverse Variation

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

What type of variation does this scenario represent?
The outside temperature
and the number of layers of clothes you need to wear outside to feel comfortable 

• direct variation

• inverse variation

• joint variation

• none of these

Q1. What is the sum of 5 and 7?

• A) 10

• B) 12

• C) 15

• D) 20

Is the given table a direct variation? If so, what is the constant?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.