Direct Indirect Variation

What type of variation does this scenario represent?
The length of time you charge your cell phone
and the battery power 

• direct variation

• inverse variation

• joint variation

• none of these

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

• direct

• inverse

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?

• direct

• inverse

Type of variation?

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

• direct

• inverse

if one book costs ₹57 how many books can be bought in ₹741

• Inverse Variation

• Direct variation

• None

The quantity of wooden box made is directly proportional to the number of wooden blocks. The number of wooden blocks needed for 30 boxes is 120. How much wooden blocks are needed for a box?

• 8

• 2

• 3

• 4

A person’s weekly pay is directly proportional to the number of hours worked. Shawn’s pay is $123.00 for 20 hours of work. What is the constant of variation?

• k = 123

• k = 20

• k = 6.15

• k = 0.16

In a direct variation, y = 39 when x = 3. 
Find the value of y when x = 2.

• 26

• 3

• 58.5

• 2