Find the interval(s) where the function is increasing and the interval(s) where it is decreasing.

Question

f(x) = 3x + 5

ok...i think you find the derivative first...? but i thought u had to find the critical points somehow... i am so lost! can someone show me how to do this problem? PLEASE! :)

Answer 1

Follow the rules. Derivative for the slope, which in this case is always positive. The second derivative is zero.

There are no critical points. and there are no intervals where the function is decreasing.