The following data relating to units shipped and total shipping expense have been assembled by Archer Company, a wholesaler of large, custom-built air-conditioning units for commercial buildings: Month Month Total Shipping Units Expense January 3 $1,800 February $2,300 $1,700 April 5 $2,000 May $2,300 June $2,700 July 2 $1,200 6 4 March 7 8 Required: 1. Prepare a scatter graph using the data given above. Plot cost on the vertical axis and activity on the horizontal axis. Is there an approximately linear relationship between shipping expense and the number of units shipped? 2. Using the high-low method, estimate the cost formula for shipping expense. Draw a straight line through the high and low data points shown in the scatter-graph that you prepared in in requirement 1. Make sure your line intersects the Yaxis