Answer
x=-6
Work Step by Step
$\frac{-1}{2}$=$\frac{b2-b1}{a2-a1}$
$\frac{4-8}{2-x}$=$\frac{-1}{2}$
$\frac{-4}{2-x}$=$\frac{-1}{2}$
-8= -1(2-x) (Cross multiply)
-8 =-2+x => x=-6 (Simplify)
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 5 - Linear Functions - 5-1 Rate of Change and Slope - Practice and Problem-Solving Exercises - Page 297: 44
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