The correct answer is option 2;
Not a function.
A relation can only be a function when every single x values have exactly one corresponding y value.
Observe that along the x-axis, two of the points are shown with the ordered pairs;
This means, when x is negative 2, y is 0. Also when x is 6, y is 0.
For this reason, the graph is not a function. The values of y = 0 has two different x values