SOLUTION: Assume that y varies inversely as x. If y = -8 when x = -9, find y when x = 4

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Assume that y varies inversely as x. If y = -8 when x = -9, find y when x = 4      Log On


   

Question 447728: Assume that y varies inversely as x. If y = -8 when x = -9, find y when x = 4
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If varies inversely as , then



Then if when , then



From which we derive:



Hence:



So if , substitute 4 for and do the arithmetic.

John

My calculator said it, I believe it, that settles it
The Out Campaign: Scarlet Letter of Atheism