The provided graph reveals the changes in prices of “high-tech gadgets” over time. There are two kinds of “high-teck gadgets”, navigation systems and smart phones.
In 2004 from july to december, Navigational systems were the most expensive, caping at around 4000 US dollars, while smart phones where cheaper, with a price of 3000 US dollars. Over the period from july to june 2005, the prices of navigation systems and mobile phones decreased, where navigational systems stayed at approximately 3200 US dollars, while mobile phones went from 3000 US dollars to approximately 2800 US dollars before increasing again in july of 2005 to 3000 again. From the end of 2005 till the beginning of 2006, navigational systems took the lead with a price of 3500 dollars before going down again in june 2006 when it was priced at approximately 2600 dollars, the same price of mobile phones which didn’t change since the beginning of 2006.
Overall, Navigational equipments where the most expensive over the years.