Question

What is a one-to-one function?

a. A function f is called a one-to-one function if it has negative slope.
b. A function f is called a one-to-one function if it is a vertical line.
c. A function f is called a one-to-one function if it never takes on the same value twice.
d. A function f is called a one-to-one function if it is a horizontal line.
e. A function f is called a one-to-one function if it periodically takes on the same value.

Answer 1

C.

Explanation:

A one to one function is a function in which an element in a domain is corresponding to the a single element in the range. That is, each element in the domain has exactly one image in the range.

To answer the question that say : What is a one-to-one function?

A function f is called a one-to-one function if it never takes on the same value twice.

Therefore the correct answer is option C.