Question

Use the vertical line test to determine if the relation {(–6, –2), (–2, 6), (0, 3), (3, 5)} is a function. Explain your response.

Answer 1

the vertical line test just means if you draw a vertical line on the graph, then that line will hit only 1 point on the function and no more...

or it can also be looked at as, all x values MUST be different in order for it to be a function.