Question

which of the following equations are proportional? y = 3x+4, y=2x, y=4x+4, y=4x+2

Answer 1

For an equation to be proportional, it must be linear and have no y-intercept. Automatically, you can say that the following arent proportional:
y = 3x+4
y=4x+4
y=4x+2
That leaves you with only y=2x