I need help please I don't understand

1,3

Step-by-step explanation:

with the equation y= -3x + 2

The first one works since 2*-3 = -6 and + 2 = -4

The second one doesn't work since -6*-3 = 18 and + 2 = 20

one note to make is that if you move the x up by one it decreases by 3 on y

and if you go down by one on the x you increase by 3.

The third one works since -1*-3 = 3 and + 2 = 5

The fourth one doesn't work since 3*-3 = -9 and + 2 = -7.

the answer is 62.8 cubic units