I cant really show you how to graph this but i can try to explain it. you would make a 4 quadrant graph and do rise over run.
1)start by making the graph
2) on the line of the graph marked Y is where you would put -4
3) From -4, you would go up (rise) by 2 and go over to the right 1 where you end is the slop
That would be 7 - (-7) = 7 + 7 = 14 degrees F
Answer: 360 cubic cm
Step-by-step explanation: you just multiply all the numbers.