## Algebra 1

Published by Prentice Hall

# Chapter 6 - Systems of Equations and Inequalities - Chapter Review - 6-1 Solving Systems by Graphing - Page 405: 9

#### Answer

All real numbers Please see the graph.

#### Work Step by Step

The graph was made using graphing software. $y = x+1$ $2x-2y =-2$ $2x-2*(x+1) = -2$ $2x - 2x - 2 = -2$ $-2 = -2$ (true for all values of x) Since this is true for all values of x, the two lines are the same.

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