Answer is
Point slope form is y - 3 = -3 (x + 3)
Slope is -3
y intercept form is y = -3x + 6
Step by step
We have pairs (-3, 3) and (-2, 0) where we can find slope
y 2 - y1 over x2 - x1
0 - 3 over -2 - -3
-3 over 1
Slope is -3
Point slope form
y - y1 = -3 (x - x1)
y - 3 = -3 (x + 3)
y -3 = -3x -9
y = -3x + 6