what is the expected electricity cost when 425 machine hours are used 613921
U sonic, Inc., has collected the following information on its cost of electricity:
|
Machine |
Total |
|
|
January |
625 |
$280 |
|
February |
700 |
$290 |
|
March |
500 |
$265 |
|
April |
425 |
$200 |
|
May |
450 |
$248 |
|
June |
300 |
$170 |
|
July |
375 |
$180 |
|
August |
550 |
$240 |
|
September |
575 |
$260 |
|
October |
280 |
$150 |
|
November |
430 |
$215 |
|
December |
200 |
$100 |
Required
- 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.
- What is the equation of the line you drew in part (a)?
- What is the expected electricity cost when 425 machine hours are used?
- Why does your answer to part (c) differ from the actual cost for the month of April, when 425 machine hours were used?