Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 5 - Linear Functions - Concept Byte - Investigating y=mx+b - Page 305: 3

Answer

If you change the sign of m, then you are reflecting the line over the y-axis.
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Work Step by Step

We found this by looking at the graph. When we changed the slope from positive to negative, we saw that the y-intercept stayed the same but all of the other points changed their signs for their x coordinate. This led the lines to reflect over the y-axis.
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