Question

Which equation has a constant of proportionality equal to 7?

A
4y = 28%
7y=28%
С
28y=4%
D
28y = 7x

Answer 1

The correct choice is A

Explanation:

Proportionality

Two variables x and y are proportional if:

y = kx

where k is the constant of proportionality.

We are given that the constant of proportionality of 7, thus the equation is:

y = 7x

Multiplying by 4:

4y = 28x

It's apparent the correct choice is A