The line graph illustrates changes in the average monthy cost measured in euros, of four types of mobile contratcs in a particular country throughout 2012.
Overall, Demo and Alpha contracts experiences upward trends, while slim and ETX showed more mixed pattern, with slim declining steadily and ETX fluctating at arelatively low level.
At the beginning of the period, Demo was the most expensive plan at around 22 euros, followed by Alpha at 18 euros, Slim at 16 Euros, and ETX at approximately 9 Euros. Demo costs dipped slightly in January then rose consistently, plateauing between march and April at about 24 euros, before climbing to a peak of 33 euros in July. Alpha followed a broadly similar trajectory, increasing sharply from 18 euros in February to 22 euros in march, fter which it levelled off and then climbed gradually to reach 27 euros by August.
In contrast, Slim dropped from 16 in december too just under 12 euros in June before rebounding slightly toward 14 euros by the end of the period. ETX remained the cheapest option throughout , fluctuating marginally between 9 euros dan 11 euros before endig the year just below 12 euro.
In Summary, Demo and alpha became increasingly costly, with demo remaining the priciest contract, whereas slim and ETX were considerably more affordable desoite minor fluctuations