The vertex form:

(h,k) - the coordinates of the vertex

The coordinates of the vertex are
(-4,13).
Answer:
The number of hours.
Step-by-step explanation:
The dependent variable is what you are mesuaring.
A rectangle....unless it isn't a photo taken from a weird angle....but thats a rectangle.
I know its not division,addition,multiplication,with the process of elimination its reflexive