Algebra: A Combined Approach (4th Edition)

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

Chapter 3 - Section 3.4 - Slope and Rate of Change - Exercise Set: 85


The slope between $(1,3)$ and $(2,1)$ $\frac{1-3}{2-1}=\frac{-2}{1}=-2$ The slope between $(-4,0)$ and $(-3,-2)$ $\frac{-2-0}{-3-(-4)}=\frac{-2}{1}=-2$ Two sides have the same slope, so these two sides are parallel. These sides are also opposite sides. So this is a parallelogram.

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