Questions:
1. Prepare a scatter graph 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.
2. What is the equation of the line you drew in part (a)?
3. What is the expected electricity cost when 425 machine hours are used?
4. Why does your answer to part (c) differ from the actual cost for the month of April, when 425 machine hours were used?