Usonic, Inc., has collected the following information on its cost of electricity:

Required

a. Prepare a scattergraph of Usonic's electricity costs for the year. Plot the total electricity cost on the y-axis. Draw a line that you think best represents the electricity cost function. Be sure that the line runs through at least one of the data points.

b. What is the equation of the line you drew in part (a)?

c. What is the expected electricity cost when 425 machine hours are used?

d. Why does your answer to part (c) differ from the actual cost for the month of April, when 425 machine hours were used?

Transcribed Image Text:

Machine Total Electricity Costs Hours $280 $290 $265 $200 $248 $170 $180 $240 $260 $150 $215 $100 January February March April May June 625 700 500 425 450 300 July August September October 375 550 575 280 November 430 December 200