Hello, sinewave85!
Hope this refreshes your memory . . .
Swap the variables: .Find the inverse of: .
Multiply by
Expand: .
Rearrange terms: .
Factor: .
Hence: .
. . Therefore: .
I can't remember how to work with functions\equations where there is a variable in the denominator, like
specificly, how to get the inverse function after you swap the x and y, but in general just how to get the variable out of the denominator. I know you multiply by an expression equivalent to 1, but I can't remember how. This is driving me nuts. Thanks.