Do you need the number 9/2 simplified? if so, the answer is 4 1/2 :) hope this helps!
5
Ac= 10 inches is the diameter
Fa is the half of the circle so divided 2 to get 5
The equation of the line written in slope-intercept form is:

Where m is the slope and b is the y-intercept.
You find the slope using the formula:

Where point A coordinates' are (-4,-19) and point B (-6, 4).


Now you find b (y-intercept) substituting in y=-23/2x+b the coordinates of point A or point B:
(I'll use point B coordinates')
y=-23/2x+b
4=-23/2×(-6)+b
4=46+b
b=-42
The equation of the line is y=-23/2x-42