Direct vs Inverse Variation

Determine the type of variation.

• Direct

• Inverse

• None

In this type of variation, both x and y are either increasing or both are decreasing (a)  

• direct

• inverse

In this type of variation, x and y are doing the opposite- when one is increasing, the other is decreasing (a)  

• inverse

• direct

• neither

Determine the type of variation.

• Direct

• Inverse

• None

Type of variation?

The time you study for a test, the grade you will get on the test.

• direct

• inverse

Type of variation?

Hours you work at your job and your paycheck amount.

• direct

• inverse

Type of variation?

Hours you drive to your destination and the distance you are away from your destination.

• direct

• inverse

Type of variation?

Water usage at your home and the amount of water bill.

• direct

• inverse

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

What type of variation does this scenario represent?
You and some friends decide to buy 2 pizzas and split the cost evenly.
The number of friends who are sharing the cost of the pizzas
and the amount of money you pay for your share.

• direct variation

• inverse variation

• joint variation

• none of these