Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 3 - Group Activity - Finding a Linear Model - Page 267: 2

Answer

$y=2.1x+49.4$

Work Step by Step

$(4, 57.4)$ and $(5, 59.5)$ $m$ = change in y/change in x $m = (59.5-57.4)/(5-4)$ $m = 2.1/1$ $m=2.1$ $y=mx+b$ $57.4=4*2+b$ $57.4=8+b$ $57.4-8=8+b-8$ $49.4 =b$ $m$ says how a change in $x$ is affected, and $b$ shows at what value $y$ starts.
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