algebra
posted by
Lori on
.
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,
"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,
Thank you, I thought I was on the right track but wasn't sure.

algebra 
abule,
solution:
y=kx
72=k(8)
72/8=k
9=k
so 9 is our constant...