Answer
domain: $(-\infty,\infty)$
Work Step by Step
Since $f(x)=7x+15$ is a diagonal line, the domain is all real numbers: $(-\infty,\infty)$.
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 2, Functions - Chapter 2 Review - Exercises - Page 268: 15
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