Hi guys, I was given a graph of the derivative or f ' (x), not f (x), which is where I am slightly confused on this problem... Given the graph of f '(x) answer questions about f(x)

a) for what values of x is the original function increasing/decreasing?

b) what values does original function, f(x) have horiz tangent lines?

c) what approx values of x does original function, f(x) have inflection points?

Here's what I have so far, but im not sure if I am doing this correctly for the values of the original function or for the graph of the derivative:

increasing at -infinity to -1.5 AND 1 To infinity

decreasing at -1.5 to 1

Horiz tangent lines at x=1 and -1.5

Inflection Points = none