find the equation of the line that pass through (-2,2) and falling 2 units for every units increas in x .
Slope = rise / run given for this problem as -2 /1 = -2
y = mx + b m = slope
so we have y = -2x+b Now substitute in the point given to calc 'b'
2 = -2(-2) + b
so b = -2
y = -2x-2