The list price of a product is $52.99. the trade discount is $8.00. the net price of this product is

This graph will require two lines. The first one:

It goes up by one, and to the right one. It's x-axis intercept will be at -4. Then, it will rise up to the y-axis intercept, which is 4. That will be your first line.

Second: This line is going down by one, and to the right as one. It goes straight from the y-axis intercept of 2, to the x-axis intercept of 2.

Reminder that both lines are constant and infinite in both ways. I hope that made sense, I would send a capture but I don't know how