Question

what is a set of ordered pairs in which each input has exactly one output called?
a. a curve
b. a function
c. a relation
d. a line

Explanation:

In mathematics, a function is defined as a set of ordered pairs where each input (or domain element) is associated with exactly one output (or range element). A relation is a set of ordered pairs but doesn't require each input to have only one output. A curve or a line are geometric concepts and not defined by this input - output property. So the correct answer is B.

Answer:

B. a function