Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 11 - Cumulative Review - Page 669: 6

Answer

$f(x)=\dfrac{3}{2}x-\dfrac{13}{2}$

Work Step by Step

Expressing the equation $3x-2y=6$ in the slope intercept form $(y=mx+b)$ results to \begin{array}{l}\require{cancel} -2y=-3x+6\\ y=\dfrac{-3}{-2}x+\dfrac{6}{-2}\\ y=\dfrac{3}{2}x-3 .\end{array} The slope of the line above is $m=\dfrac{3}{2}$. Since parallel lines have the same slope, then the parallel line passing through $(3,-2)$ has the same slope, $m=\dfrac{3}{2}$. Using the Point-Slope Form, $y-y_1=m(x-x_1$), the equation of the parallel line is \begin{array}{l} y-(-2)=\dfrac{3}{2}(x-3)\\ y+2=\dfrac{3}{2}(x-3)\\ 2y+4=3(x-3) \text{...multiply both sides by 2}\\ 2y+4=3x-9\\ 2y=3x-13\\ y=\dfrac{3}{2}x-\dfrac{13}{2} .\end{array} In function notation, the parallel line has equation $ f(x)=\dfrac{3}{2}x-\dfrac{13}{2} .$
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