Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 4 - Section 4.5 - Finding an Equation from Its Graph - 4.5 Problem Set - Page 238: 7

Answer

$y=2x-3$

Work Step by Step

The line crosses the y-axis at $y=-3$ so $b=-3$. Thus, our equation is $y=mx-3.$ Use the point $(1.5,0)$ to substitute into the equation to obtain: $y=mx+1\\0=m(1.5)-3\\3=1.5m\\2=m$ Thus the equation is: $y=2x-3$
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