Ur not dumb!!! i graphed the line for u here. i suggest watching some khan academy videos for extra practice!
H'(x) = 2f'(x)
h'(1) = 2*f'(1) = 2*4
h'(1) = 8
Answer:

Step-by-step explanation:
It's already in a form that only ha positive exponents. Just to state it though you could rewrite it as
or
The question asks for positive exponents though so yu don't need to do that.
You also need to know
so in this case 
so 
Just 9
I'm not sure for the second one but I think 1 ft