Question

What did I do wrong?

Answer 1

You did everything wrong, that's what

Answer 2

hehehe

Answer 3

nevermind. I got it.

Answer 4

anyhow.... f'(x)=3 simply means, y' =3 and x = 3
so, that'd be the slope and the x-coordinate

and you'd get the y-coordinate by usig the x-coordinate in the original f(x)