Algebra: A Combined Approach (4th Edition)

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

Chapter 4 - Section 4.1 - Solving Systems of Linear Equations by Graphing - Exercise Set - Page 291: 29

Answer

Infinite solutions

Work Step by Step

Please see the screenshot of the tables for the two equations. Purple line: $y-3x=-2$ Green line: $6x-2y=4$ Purple line: $y-3x=-2$ $y-3x+3x=-2+3x$ $y=3x-2$ ($m=3$, y-intercept is -2) Green line: $6x-2y=4$ $6x-2y+2y-4=4+2y-4$ $6x-4=2y$ $(6x-4)/2=2y/2$ $3x-2=y$ $y=3x-2$ ($m=3$, y-intercept is -2) The two lines have the same slope and y-intercept. Thus, the two lines are actually the same line and have an infinite number of solutions.
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