Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 5 - Linear Functions - 5-3 Slope-Intercept Form - Practice and Problem-Solving Exercises - Page 312: 23



Work Step by Step

The point-slope form is y=mx+b. The formula for slope is m=$\frac{y2-y1}{x2-x1}$ Using points from the graph (2,1)(0,-3), the slope is m=$\frac{1-(-3)}{2-0}$=$\frac{4}{2}$ =2. Using the point-slope formula and (2,1): 1=2(2)+b 1=4+b b=-3 Plug these values into the point-slope form so the equation is y=2x-3.
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