The line grapgh illustrates two advance gadgets solding and their prices chnaged over the period from 2004 to 2006 and comparing in 6 months from july-december and jan-june.
In 2004 july-december, the most expensive gadget was navigation sytem and smart phones were least remained over the period. The former started from almost 4000$, while later more than 3000$. Both prices moderately decreased to ( 3300$ and 2800$) in 2005 jan-june. After that, navigation system figure droped slightly to 3100$ in the next six month. while, the smart phones rised minimally nearly 100$ in 2005 jan-july. The pricing trend changed for both products in the following six months. The navigation system prices climbed gradually to 3500$ and then dropped moderatley to 2500$, meanwhile there was a small declined for smart phones and the figure met with the navigation system at the end of the period.
Overall, the price of the two gadgets seen declined in both and navigaion system product price suffered a more significant drop.