"A city official is modeling the demand for bus transportation as a function f(x, y) of two variables: x = price of a daily bus ticket in $, y = price of parking per day in a downtown garage in $.
She hypothesizes that demand varies inversely as x and directly as 100y^2.
Answer the following questions considering that with a daily bus ticket cost of $0.50 and parking price of
$6 per day, there are 7,200 bus riders using the bus transportation system.
1. Write the mathematical function describing the demand for bus transportation:
f(x, y) = __"