SOLUTION: Suppose that y is inversely proportional to x and that y equals seven ninths when x=81. Complete parts ​(a) and ​(b). ​(a) Find the constant of proportionality k

Algebra ->  Proportions  -> Lessons -> SOLUTION: Suppose that y is inversely proportional to x and that y equals seven ninths when x=81. Complete parts ​(a) and ​(b). ​(a) Find the constant of proportionality k      Log On


   

Question 1042841: Suppose that y is inversely proportional to x and that y equals seven ninths when x=81. Complete parts ​(a) and ​(b).
​(a) Find the constant of proportionality k.
kequals=
​(b) Use y equals StartFraction k Over x EndFractiony=
k
x to find y when xequals=7.
yequals=
I need help on three questions please
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
y is inversely proportional to x and that y equals seven ninths when x=81.


k is a proportionality or variation constant.

system%28y=k%2Fx%2C7%2F9=k%2F81%29


k=%287%2F9%2981=63
-
y=63%2Fx