Question

Is the function f(x) = -4 linear or nonlinear?

Answer 1

I believe it’s nonlinear. Yes, the line is straight, but linear lines increase or decrease, but this is just a straight, horizontal line; there is no increase or decrease.

Answer 2

The function f(x)=-4 is linear

Explanation:

Because the rate of change is constant (0) this is a linear function.