The line chart illustrates the amount spending of monthly contract for four various mobile ( demo, lex, sim TX, alpha) in the European country between January and September in 2002.
Overall, it can be seen that ,the three cell phone are dramaticly rise over the period. And sim tx only are fall down lastly.
To being with,alpha cell phone cost are the lowest at 5 euro in January and it has been up to grow which 7 in april and fall dowend at june ,however,alpha cell phone cost june to September are different trend slightly increase which 25 euro.
Furthermore,demo cell phone are January are the highet which 15 euro and this trend over period are dramatic rise at july .then it following trend are the fall down which around 23 euro in September.Moreover, lex and sim tx has the almost same cell phone cost trajectory,it has been mixed at June which approximately 13 respectively.