The commission of a sales representative can be modeled by C(x) = 4n-10, where n is the number of items sold representative sales 30 items, how much commission will they earn?

Then why is the question on here if you know the answer

Hmmm i had this before , give me a sec

A

The answer would he -4,-2 because the points are just on the opposite side. since the x axis is +4 it's going to he -4 and since the y axis is -2 it stays there because whaen rotated it stays in the third quadrant