Math 2 CFA 5 Review

Suppose y varies inversely with x.
If y = 150 when x = 2, find y when x = 25.

• 300
• 75
• 1,875
• 12

The width of a rectangle varies inversely with its length.  If the width is 6 when the length is 24, give an equation that shows the relationship.

• y = 4x
• y = 144x
• y = 4/x
• y = 144/x

State what type of variation the equation represents.

• Direct

• Inverse

• Joint

• None

What is the constant (k) in this inverse variation?

• 12
• 24
• 48
• Not enough information given

Is the given table a direct or inverse variation? What is the constant of variation?

• Direct, 12
• Inverse, 12
• Direct, 1/12
• Inverse, 1/12

The current in a simple electrical circuit is inversely proportional to the resistance. If the current is 80 amps when the resistance is 50 ohms, find the current when the resistance is 22 ohms.

• 90 amps

• 100 amps

• 105 amps

• 120 amps

Solve

• 10

• 8

• 16

• 4

Solve

• 20

• 11

• 4

• -2

Solve

• 8

• 2

• 9

• 0

Solve

• 5

• 33

• 85

• 21