Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 1, Equations and Inequalities - 1.5 Use Problem Solving Strategies and Models - 1.5 Exercises - Skill Practice - Page 38: 23



Work Step by Step

Let the equation have the form $y=mx+d$. $m$ is the rate of change and shows how much $y$ increases by when $x$ increases by $1$. Hence here $m=7$. Then since $y=12$ when $x=4$, $12=4\cdot7+d=28+d\\d=-16$. Thus the equation is: $y=7x-16$
Update this answer!

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.