George moved to a new house. He tracked his electricity consumption over a period of 14 months. Consider the graph below which shows the relationship between his monthly electricity consumption, y, and X, which represents the number of months since he
started tracking
670
655
640
625
Electricity consumption (kWh)
610
595
580
X
0
2 4 6 8 10 12 14
Number of Months
Which of the following describes the graph?
OA.
a function only
OB
a relation only
OC
both a relation and a function
OD
neither a function nor a relation