Direct or Inverse

The number of pencils sold varies directly as the cost. If 5 pencils cost $0.45, find the cost of 7 pencils.

• Direct Variation

• Inverse Variation

2.The amount of money spent at the gas station varies directly with the number of gallons purchased. When 9.5 gallons of gas were purchased the cost was $36.52. How much would 12 gallons of gas cost?

• Direct Variation

• Inverse Variation

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

Was the inverse function found correctly?

• no,

• yes

Are these the graphs of two inverse functions?

• Yes

• No

• No way to tell

Are the blue and red graphs inverse functions?

• yes

• no

• no way to tell

State what type of variation the equation represents.

• Direct

• Inverse

• Joint

• None

Is the inverse function found correctly?

• yes

• no

• direct variation
• inverse variation
• joint variation
• none of these