Question

A store sells onions by the pound, the

proportional relationship is graphed on
coordinate plane below. Which equation
describes the relationship?
A) y=0.33x
B) y=0.66x
C) y=1.5x
D) y=2.3x

Answer 1

C

Explanation:

We have a linear equation in the form y = mx

Where m is the slope

The slope is the change in y divided by change in x.

We can take any 2 points on the line and see the change in y and divide it by the change in x. We will get slope, m.

Lets take points (2,3) and (6,9).

The change in y is 9 - 3 = 6

The change in x is 6 - 2 = 4

So, the slope would be:

m = 6/4 = 3/2 = 1.5

So, the equation would be:

y = 1.5x

Correct answer is C.