The given line graph shows the data on the sales of Promo Plus in Istanbul over a year.
The figure demonstrates that the sales were the highest in March while the lowest sales observed in July and September. And it remained relatively steady from the beginning to the end of the year as the sales in January and December are nearly equal.
At the start of 2007, a small rise of turkish lira was seen at 225 million in February and it increased further steeper to a peak of 350 million turkish lira. However, it is clear that there was a dramatic decline over 65% between March and July to reach a trough of 120 million turkish lira.
August sales had a rapid growth to more than 200 million turkish lira, returning back to the January level. But this was not the last as it dropped again back to the same level as July sales. October came with a slight climb of around 170 million turkish lira in sales, and further levelled off and fluctuated between 170 and 190 million turkish lira over the last two months of 2007.