Answer:

Step-by-step explanation:

Your answer is c, 638.54 − 159.50 + x ≥ 500; x ≥ $20.96
This is late, but for anyone searching the answer up in the future, the answer on Edg.enuity is the last one - where the graph starts out as a horizontal line, then decreases and touches the x-axis, then increases again.
Good luck on your assignment !!
I'm not quite sure but I believe the answer to your question is 4 sides