A summary of total charges from a small cafs natural gas bills is provided below:

Month	kJ	Cost
October	14	$187
November	17	187
December	30	230
January	35	264
February	33	270
March	20	200

Using regression analysis, the cost rate for the variable cost component is

Question 3Answer

a.

$14.33/kj

b.

$7.41/kj

c.

$2.54/kj

d.

$4.06/kj