Question

Use the graph of f(x) below to estimate the value of f ′(3):

Answer 1

I've tried to solve it, Im pretty sure f(x) = -x^2 +9
and if that's true then the derivative should be -2x right?
and when you insert it it should be -6x? But that's not an option

Answer 2

are you finding what x value gave a y value of 3?

Answer 3

Im pretty sure it's asking when x=3 what does y equal

Answer 4

when x = 3 y = 0 given y = f(x) asking here f ' (3)