"A city official is modeling the demand for bus transportation as a function (,) of two variables: = price of a daily bus ticket in $, = price of parking per day in a downtown garage in $.
She hypothesizes that demand varies inversely as and directly as 100^2.
1. Write the mathematical function describing the demand for bus transportation: f(x, y) = _"
I'm not sure how to set up this equation. I'm not sure what "the demand varying inversely as x and directly as 100y^2" means.