3. Smoothing

Identify whether there is a growth trend and/or seasonality in the following data

Month	Sale	Month	Sale	Month	Sale
Oct-12	16.32	Oct-13	15.67	Oct-14	55.24
Nov-12	18.55	Nov-13	34.59	Nov-14	48.54
Dec-12	17.06	Dec-13	30.94	Dec-14	63.42
Jan-13	6.38	Jan-14	29.10	Jan-15	68.61
Feb-13	4.10	Feb-14	36.31	Feb-15	43.21
Mar-13	3.41	Mar-14	33.34	Mar-15	51.48
Apr-13	-0.74	Apr-14	25.32	Apr-15	36.38
May-13	5.23	May-14	15.36	May-15	38.60
Jun-13	11.43	Jun-14	27.09	Jun-15	43.76
Jul-13	-3.07	Jul-14	25.11	Jul-15	42.10
Aug-13	2.37	Aug-14	37.53	Aug-15	56.27
Sep-13	9.74	Sep-14	39.14	Sep-15	48.79