Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 1 - Precalculus Review - 1.2 Linear and Quadratic Functions - Exercises - Page 18: 24



Work Step by Step

Equation of a line in point-slope form is $y-y_{1}=m(x-x_{1})$ Given: m=2, $x_{1}=1$ and $y_{1}=4$ Therefore, equation of the line is $y-4=2(x-1)$ or $y=2x+2$. When x=3, $y=2\times3+2=8$
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