We only need two points to write the equation
(0, -3) and (-2,1) are on the graph
The slope between these points is :
[ 1 - - 3 ] / [ -2 - 0 ] = [ 4] / [ -2 ] = -2
Using the point (0, -3) we have that
y = -2x - 3
In standard form we have :
2x + y + 3 = 0
+231 
