Question

Which function has a greater rate of change?

y=x + 2
y=3x - 2
y=4x + 1
y=2x - 1

Answer 1

The answer is y=4x+1. The rate of change is the number before x; that is, the slope of the equation. In this case 4 is the largest of all. So the third choice or equation is right.

Answer 2

I am going to assume this is for calculus. You would need to find the derivative of each because derivative represents rate of change.
The derivates are:
y'=1
y'=3
y'=4
y'=2

Therefore the answer it the third choice because it has the largest derivative