Algebra 2 (1st Edition)

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

Chapter 3 Linear Systems and Matrices - 3.2 Solve Linear Systems Algebraically - 3.2 Exercises - Mixed Review - Page 167: 73



Work Step by Step

Find two points: $(3,1) \rightarrow (x_1,y_1)$ $(-1,-7) \rightarrow (x_2,y_2)$ Use point-slope form: $m=\frac{1-(-7)}{3-(-1)}=2$ $y=mx+b$ $y=2x+b$ Substitute $(3,1)$: $1=2(3)+b$ $b=-5$ $y=2x-5$
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