Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 1 - Linear Functions - Chapter Test - Page 124: 11


a.) 2 b.) 8 c.) -4 d.) y=2x+8

Work Step by Step

a.) Two points that the line clearly goes through are (-4,0) and (6,20). m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{20-0}{6-(-4)}$ m=$\frac{20}{10}$ m=2 b.) The line crosses the vertical axis (y-axis) when y=8. c.) The line crosses the horizontal axis (x-axis) when x=-4 d.) y-y$_1$=m(x-x$_1$) y-0=2(x-(-4)) y=2(x+4) y=2x+8
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