Question

Which statement is true?

A. A mapping is a function if there is the same number of x-values as there are y-values.

B. A table of values describes a function if all the x-values are different.

C. A set of ordered pairs that describe a function must lie in a line when graphed.

D. A graph describes a function if no point on the graph lies directly left or right or another point of the graph.

Answer 1

B. A table of values describes a function if all the x-values are different.

a function can't have one x-value mapping to multiple y-values so if they are all different it's a good working definition fo ra function