The graph shows data about cost of monthly contract for four mean mobile phones (Alpha, Sim TX, Domo, Lex) in Europe from January to September in 2002.
Overall, all of these four mobiles phones (Alpha, Sim TX, Domno, Lex) experienced general rise in their cost. While Alpha was on top of that, however it was at the end of span. The least price was Sim TX.
Looking at the details, In January Domo stood at 15-euro. During 3 month it increased from 15 to 17 euro. In April it declined from 17 to 16 with a gap 1-euro. In may cost for DOMO rose to 20-euro the next one month it leveled of 20. Meanwhile in Jule it reached a peak for 25-euro in the given period. However, the following 3-month it declined to 23 euro. With a lower gap Lex stood at 12-euro. In February and June it fluctuated, and other time it slightly rose from 12 to 17-euro. Alpha from January to June was stable and it increased from 5 to 25-euro and outnumbered Domo.
From January to May it rose from 9 to 14. However it suddenly broken from 14 to 7.