2.2 - Direct and Inverse Variation

Which of the given graphs is a direct variation?

• A
• B
• C
• D

Does the relationship represent direct variation?

• Yes
• No

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

Do x and y show direct variation?

y = 2x + 3

• Yes

• No

Do x and y show direct variation?

y = 5x

• Yes

• No

Which equation does NOT represent inverse variation?

• Direct Variation

• Inverse Variation

• Neither

• Direct Variation

• Inverse Variation

• Neither

The time to complete a project varies inversely with the number of employees. If 3 people can complete the project in 7 days, how long will it take 5 people?

• t = 4.2 days

• t = 21 days

• t = 5 days

• t = 3 days