Work Step by Step
This statement makes sense because the variable $x$ is defined as the number of years after 1990, up to 2015. This means that the possible $x$ values (the domain) are $x=0,1,2,3,...25$.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.