Question

Which of the following best describes the graph shown below?



A. This is the graph of a one-to-one function.
B. This is the graph of a function, but it is not one-to-one.
C. This is the graph of a linear function.
D. This is not the graph of a function.

Answer 1

One to one function is a f function for which every element of the range of the function corresponds to exactly one element of the domain. One-to-one is often written 1-1. Note: y = f(x) is a function if it passes the vertical line test. It is a 1-1 function if it passes both the vertical line test and the horizontal line test.