Answer
B. the function is not one-to-one
Work Step by Step
If a function is made up of ordered pairs such that the same y-value corresponds with two different x values, then the function will not pass the horizontal line test, meaning the function is not one-to-one. Therefore, the correct answer is B, the function is not one-to-one.
(The answer is not C, because the graph does pass the vertical line test, making it a function.)
