SOLUTION: Is 5/x- y/4=1 a function or not?

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Question 768604: Is 5/x- y/4=1 a function or not?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
5%2Fx-+y%2F4=1
4x%285%2Fx%29-+4x%28y%2F4%29=1%2A4x
20-xy=4x
-xy=4x-20
y=-4%2B20%2Fx
y=20%2Fx-4
y=4%285%2Fx-1%29
Yes, a function, hyperbolic shaped.

graph%28300%2C300%2C-15%2C15%2C-15%2C15%2C4%285%2Fx-1%29%29