Well, you can do, 4+9, and 5+9, or, instead of 5+9, maybeeeee, 6+7!
Two point form:
y-(-7)/3-(-7)=x-6/-6-6
Rearrange to get y=-5/6x -2 (slope intercept form)
or y= 5x+6y=-12 (standard form)
Step-by-step explanation:
Below is an attachment containing the solution.
The surface

can be parameterized by

where

and

. Then the surface integral can be computed with
