Well, find the change in y over change in x. You get three.over one. So your slope Is positive 3.
Lets use the area formula first to find the area then help me out and i help you out we can do this together!!
Bottom left corner quadrant number 3
(10 + 14 + 8 + 16 + 12 + x ) /6 = 13
(60 + x) / 6 = 13
60 + x = 13 * 6
60 + x = 78
x = 78 - 60
x = 18 <=====
The answer should be around 4,000s but don't answer it in this form remember it tell YOU to estimate