The line graph illustrates changes in the annual amounts of three household devices sold in the Asada shop over 10 years. Overall, we can see that the annual sales of hair dryers and irons increased, while those of vacuum cleaners remained unchanged during that period.
Considering the increasing popularity of these devices, sales of hair dryers and irons started at approximately 580 and 220 in 2001, respectively. Hair dryer sales kept increasing until 2006, and from that point, the increase started to slow down until, in 2010, annual sales reached just above 800. Also, iron sales declined until 2006, and from that point, the annual decline started to increase until, in 2010, annual sales attained approximately 500.
Considering the unchanging popularity of these appliances, annual sales of vacuum cleaners started at around 230 in 2001. Annual sales of vacuum cleaners remained unchanged and reached 230 by 2010.