## Elementary Technical Mathematics

Published by Brooks Cole

# Chapter 9 - Section 9.1 - Solving Pairs of Linear Equations by Graphing - Exercises: 9

parallel

#### Work Step by Step

Find two point for each equation Plot and connect with a line. $3x-6y=12$ $3(0)-6y=12$ $-6y\div-6=12\div-6$ $y=-2\longrightarrow$ one point is (0,-2) $3x-6y=12$ $3x-6(0)=12$ $3x\div3=12\div3$ $x=4\longrightarrow$ one point is (4,0) $4x-8y=12$ $4(0)-8y=12$ $-8y\div-8=12\div-8$ $y=-1.5\longrightarrow$ one point is (0,-1.5) $4x-8y=12$ $4x-8(0)=12$ $4x\div4=12\div4$ $x=3\longrightarrow$ one point is (3,0) The lines are parallel. There is no common solution.

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