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alnour wrote:The graph shows how prices of advanced tools differ over time between 2004 and 2006 in Egypt in terms of US dollars. A glance at the chart, then it is noticed that the navigation system was at higher price than smart phones but at 2006 they became at a similar price.(<--Reword to: "It is clear that navigation systems were more popular in 2004, but by 2006, they were at a similar price to smart phones.")

In 2004, the prices were steady during the year for both navigation and smart phones, they were 4000$ and 3000$ respectively.(<--Reword to: "In 2004, navigation systems and smart phones cost $4000 and $3000 respectively.") Though in 2005, the first half of the year had the navigation system and smart phones cost 3200$ and 2700$ accordingly.(<--Reword to: "However, in 2005 there was a price drop for both products to $3200 and $2700 respectively.") By the second half of the year, the two prices were very similar with just $100 difference.

2006 witnessed a variety of changes. in the first half there was a contrast noticed with the navigation at the price of 3500$ and the smart phones lower by 900$.(<--Reword to: "The price of navigation systems rose again to almost $3500, while smart phones dropped to $900.") Then the two prices shared the same 2600$ cost.(<--Reword to: "However, by the end of the year, the cost of both products was the same, $2600.")
To sum up, navigation system prices decreased with the advance of technology, while smartphones maintained a regular price over the years.