A point doesn't have slope. Once you have TWO points, then the line between them has a slope.
The slope is (how far the line rises from one point to the other) divided by (the level distance between them).
The answer to your question is A
Line a- x=-10.5
line b- x=-5
Let

we know that

step 1
find distance FA


step 2
find distance AB

step 3
find the distance BC




step 4
find the perimeter
the perimeter is equal to
![P=2*[FA+AB+BC] \\ P=2*[22.36+10+14.14] \\ P=93 units](https://tex.z-dn.net/?f=P%3D2%2A%5BFA%2BAB%2BBC%5D%20%5C%5C%20P%3D2%2A%5B22.36%2B10%2B14.14%5D%20%5C%5C%20P%3D93%20units)
step 5
find the area
the area is equal to
area triangle AFE+area rectangle ABDE+area triangle BDC
step 6
find the area of triangle AFE

step 7
find the area of the rectangle ABDE

step 8
find the area of the triangle BDC

11 = 0.125
12 = 0.16
13 = 0.083
14 = 0.1