Question

If Tristan wants to stretch the spring by 9 inches, how many kilograms of weight must he apply to it?

Answer 1

Explanation:

Substitute y = 9 into the equation y = 3x, or locate the answer on the graph:

y = 3x

9 = 3x.

Divide both sides of the equation by 3:

`(9)/(3)` =
`(3x)/(3)`

3 = x

The spring stretches 9 inches with 3 kilograms of weight attached to it.