Question 1066272
Let  x1 = 2 and y1 = 2  and then let x2 = -2 and y2 = 2

Then  m =  (y2-y1)/(x2-x1) =  (2-2)/(-2-2) =  0

So y = mx + b

Pick a point, it doesn't matter which one. Let's choose (x1,y1) for simplicity.  Then  x = 2 and y = 2.   So  2 = 0(2) + b. 2 = 0+b, so b = 2.

Therefore  y = 0(x) + 2... or simply  y = 2.