#### Answer

x=7

#### Work Step by Step

m=$\frac{y_2-y_1}{x_2-x_1}$
m=$\frac{9+3}{7-7}$
m=$\frac{12}{0}$
m=undefined
Therefore, the equation is x=7.

Published by
Brooks Cole

ISBN 10:
0-53449-636-9

ISBN 13:
978-0-53449-636-4

x=7

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