C. Vertex (x,y). The vertex is right in the middle of the quadratic graph.
1).
$6
$24
$112
$625
2).
$475
$2
$160
4).
Jacquie saves $2 if she gets a friend to join the gym
5).
The tip should be $1.26
The answer you are looking for cannot be received by me because i do not know