Given the graph from the question
We want to find the slope
Solution
From the graph, the major two points are already indicated
i.e.

The formula to find the slope (m) is given as

Using the indicated coordinates


Therefore, the slope is 2
Option D
Should be about 40 if your rounding up
4 side. double 2 sides its x2. double 4 sides its x4
8+9+6+10+7+9+11=60
60/7=8.57
(60+X)/7=9
60+X=63
-60 -60
X=12
Something in my work is wrong but the correct answer is 12 letters