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if "y" varies directly with "x", find the constant of variation for an equation containing the following points (-1.5,4.5) and (2.8,-8.4)

Guest Apr 7, 2015

Best Answer 

 #1
avatar+92194 
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$$\\y=kx\qquad $Where k is the constant of variation$\\\\
4.5=k*-1.5\\\\
4.5/-1.5=k\\\\
k=-3\\\\
check\\\\
-3*2.8=-8.4\quad $Yes that is what it needed to be $$$

Melody  Apr 8, 2015
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1+0 Answers

 #1
avatar+92194 
+10
Best Answer

 

$$\\y=kx\qquad $Where k is the constant of variation$\\\\
4.5=k*-1.5\\\\
4.5/-1.5=k\\\\
k=-3\\\\
check\\\\
-3*2.8=-8.4\quad $Yes that is what it needed to be $$$

Melody  Apr 8, 2015

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