Question

is this graph a function or not a function? options: not a function, function

Explanation:

Step1: Recall Vertical Line Test

The vertical line test states that a graph represents a function if no vertical line intersects the graph at more than one point.

Step2: Apply Vertical Line Test

For the given parabola (opening downward), any vertical line drawn will intersect the graph at most once. So it passes the vertical line test.

Answer:

Function