The number of X-rays taken and X-ray costs over the last nine months in Beverly Hospital are given below:

1. Using the high-low method, estimate the cost formula for X-ray costs.

1. Using the cost formula you derived above, what X-ray costs would you expect to be incurred during a month in which 4,600 X-rays are taken?

\begin{tabular}{lcc} \hline Month & X-Rays Taken & X-Ray Costs \\ \hline January & 6,250 & $28,000 \\ February & 7,000 & $29,000 \\ March & 5,000 & $23,000 \\ April & 4,250 & $20,000 \\ May & 4,500 & $22,000 \\ June & 3,000 & $17,000 \\ July & 3,750 & $18,000 \\ August & 5,500 & $24,000 \\ September. & 5,750 & $26,000 \end{tabular}