The owner of the Queensland Restaurant would like to determine the fixed and variable components of the restaurant's utility expenses. The owner believes that the variable component of the utilities cost is driven by the number of meals served.

Meals served Utilities cost

January 3,600 P1,560

February 2,000 P1,060

March 2,900 P1,350

April 3,500 P1,500

May 3,900 P1,580

June 2,100 P1,250

July 1,900 P1,100

August 1,000 P 850

September 1,250 P 990

October 1,400 P 880

November 2,600 P1,180

Required:

[a] Plot the data on a graphing paper.

[b] Using the scattergraph method, derive a cost formula for utilities cost.

[c] Use your cost formula to predict the utilities cost if 5,200 meals are served.