Question

Does this graph show a

function? Explain how you know.
• A.
No; there are y values that have more than one
x-value.
•
B. Yes; there are no y-values that have more than
one x-value.
• C. No; the graph fails the vertical line test.
•
D. Yes; the graph passes
the vertical line test.

Answer 1

C

Explanation:

It is fine if we have double y values, but if there are repeated x values it is not a function.