For the given graphs, the graph will be a function is for one value of x there is a one value of y.
We will check the options:
A) The graph is not function beacuse when x = -1, there are two values of y
B) The graph is not function beacuse when x = -4, there are two values of y
C) The graph is a function, for every value of x, there is a single value of y
D) The graph is not function beacuse when x = -1, there are two values of y
So, the answer will be option C
