Question

What is the y-intercept of the line shown on the graph that represents a proportional relationship?

y=-4
y=0
y=1
y=2

Answer 1

y=0

Explanation:

Proportions

A direct proportion is a relation between variables where their ratio is a constant value. This means that if y and x are proportional, then:

y=k.x

Where k is the constant of proportionality.

The y-intercept can be obtained by setting x=0. Note the y-intercept of every proportional relationship is y=0.