Need to know it in slope-intercept form.
we need to "isolate" y, here
subtract x from both sides
2y ≥ - x - 21
divide both sides by 2
y ≥ (-1 /2) x - 21/2
and that's in S-I form .... the slope is (-1/2) and the y intercept is (0, -21 / 2)
x+2y>-21 -> 2y=-x-21
it is in slope intercept form
