We had to add another column and then were it says C1 we write the equation we want to use. In C2 we write equation again. The equation I used was y=-3x^2. After that I just drag the line so the answers to the equation would appear. Then I had to compare the two functions and They were similar because just the answers were the same thing but just one of them were negative. One had a curve going up and the other curve went going down.