Developing an Equation from Average Costs

The Desert Dog and Cat Hotel is a pet hotel located in Las Vegas. Assume that in March, when dog$-$days $($occupancy$)$ were at an annual low of $500,$ the average cost per dog$-$day was $$22.$ In July, when dog$-$days were at a capacity level of $4,500,$ the average cost per dog$-$day was $$8.$

$2011674,000215,000$