Posted by **Lori** on Tuesday, August 17, 2010 at 7:34pm.

Find the variation constaant and an equation of variation where Y varies directly as X and Y = 72 hen X = 8

The variation constant is K = ?

The equation of variation is Y = ?

I think that K = 9 but not sure

I don't have a clue about the rest.

- algebra -
**Reiny**, Tuesday, August 17, 2010 at 7:58pm
"Y varies directly as X" ----> y = kx

but we are given x=8, y = 72

72 = k(8)

k = 9, so

y = 9x

all done!

- algebra -
**Lori**, Tuesday, August 17, 2010 at 8:01pm
Thank you, I thought I was on the right track but wasn't sure.

- algebra -
**abule**, Monday, February 22, 2016 at 12:51am
solution:

y=kx

72=k(8)

72/8=k

9=k

so 9 is our constant...

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