D--because it has y^2 in the equation and to isolate y you have to take the square root, the graph is going to be curved rather than linear.
Roberta it would cost 52.80 for 22 wings
You would of taken 28 dollars away after 7 days because if your taking away 4$ each day you just have to figure out 4 times what equals 28 witch is 7
So the answer is 7 days