Q1) Westminster Company has had following experience over past five quarters:
Units produced

Electricity cost ($)

27,000

101,000

32,000

120,000

31,000

116,000

20,000

84,000

22,000

90,000

a) Using highlow method, find out the equation for electricity cost (Y) as function of units produced (X). Suppose a linear function.
b) Using your equation, predict electricity cost at the volume of 29,000 units produced.