The equation for line l is y = 4
To solve the problem, substitute the given points for x in the given equation to get

Solving the three equations simultaneously, we have:
a = -3, b = 2 and c = -5
Therefore, the required equation is
The volume in cubic cm, is 108 cm cubed (or to the 3rd power). The formula used to find the volume is Length times Width times height.