Answer:
-1/2
Step-by-step explanation:
The slope is the change in y over the change in x.

For this question:

it is easy 90x+90y then divide by 4
Step-by-step explanation:
Answer:
11.25
Step-by-step explanation:
The equation for a parabola is:
y − k = 1/(4p) (x − h)²
where (h, k) is the vertex and p is the distance from the focus to the vertex.
1/(4p) = 1/45
4p = 45
p = 11.25
The distance from the vertex to the focus is 11.25 inches.