Modeling with Rational Functions Answers

What does the number 160 represent in the rational function that models the situation?

Which rational function models the average cost per skirt, y, in dollars, for making a total of x skirts?

The function models the average annual cost of owning a cat for x years. On average, which pet costs more per year over a 10-year period?

On average, how much more is the total cost of owning a cat for 10 years than owning a small dog for 10 years? $