Answer
The given relation is a function.
Domain: $\{\text{Less than 9th grade},\text{9th-12th grade},\text{High School Graduate},\text{Some College},\text{College Graduate}\}$
Range:$\{\text{\$18,120},\text{\$23,251},\text{\$36,055},\text{\$45,810},\text{\$67,165}\}$
Work Step by Step
A relation is a function if for all $x$ values there is exactly one corresponding $y$ value. The domain is the set of values the function can take and the range is the set of values which the function “produces” from the values of the domain.
The given relation is a function because for each value in the first set, there is only one corresponding value in the second set.
Domain: $\{\text{Less than 9th grade},\text{9th-12th grade},\text{High School Graduate},\text{Some College},\text{College Graduate}\}$
Range:$\{\text{\$18,120},\text{\$23,251},\text{\$36,055},\text{\$45,810},\text{\$67,165}\}$
