For a graph to be a function, the following condition must be met:
• There must only bye one value of y for a given value of x.
In this case For the representation we have, we can see that for all of the values of x we get two values for y:
Which does not meet the condition indicated to be a function.
We can also make the vertical test, which is to draw a vertical line, and of it touches the graph more than 1 time, the representation is not a function:
It does not passes the vertical line test
So the answer is:
-Not a function
-The graph does not pass the vertical line test
