Answer:
22.6°
Step-by-step explanation:
Reference angle = <FDE
Side opposite to <FDE = 5
Hypotenuse = 13
The trigonometric ratios to apply is:

Plug in the values



(nearest tenth)
I think the answer is -16y=x^2
Peers if not of similar circumstances may be biased or not understand the situation as well.
You can find the slope using the following formula: