Second Question:

$(3$ Marks$)$

The following information about the electricity cost of your house for the first six months:

$\backslash$table$[[$Month$,$kilowatt Hours,Cost of electricity$],[1,5600,970],[2,5000,859],[3,7000,1200],[4,6200,990],[5,5500,960],[6,6800,1160]]$

By using excel: Find the cost equation for electricity cost and estimate it for July if expected maintenance hours is $5500$ hours. Why is there difference between your number and what included in May.