could someone please help me with letter c?

The number of X-rays taken and X-ray costs over the first nine months of 2018 are given below. Ints January February March April May June July August September X-Rays Taken 6,250 7,000 5,000 4,250 4,500 3,000 3,750 5,500 5,750 X-Ray Costs $28,000 $29,000 $23,000 $20,000 $22,000 $17.000 $18,000 $24,000 $26,000 Skipped eBook Print References Required: Using the high-low method, estimate the cost equation for X-ray costs. (b) Using the cost equation you derived in (a), estimate the X-ray costs if 4,600 X-rays are taken. Prepare a scatterplot using the data given. Use Excel to fit a straight line through the data points. Write down the cost equation. Briefly explain why the cost equation you estimated using Excel is different from the one you estimated using the high-low method in (a)