SOLUTION: Hey, I don't get this problem at all: if y varies directly as x and y=12 when x=8, find y when x=-4. thanks

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Question 85308: Hey,

I don't get this problem at all: if y varies directly as x and y=12 when x=8, find y when x=-4.

thanks
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Write it as y+=+kx
12+=+k%2A8 solve for k
k+=+3%2F2
Now solve for this case:
x+=+-4
y+=+kx
y+=+%283%2F2%29%28-4%29
y+=+-6 answer