Yeah 420 i think hope this helps
The area of the red part is greater than the area of the blue part.
You find a triangle with two of the points. Use rise over run (up or down and left or right) See how many squares rise takes and how many squares run takes. Then with rise/run simplfy the fraction and you should get the slope.
M=2-(-6)/(-1)-(-2)=8
Y=8x+b
-6=8*(-2)+b
-6=-16+b
B=16-6=10
Y=8x+10
I hope my answer is help to you