The provided line graph illustrates the statistics of the average monthly temperature in three major cities. It is seen that both Boston and Paris’ average temperature had increased at the beginning of the year and started to decline at the middle of the year, while Melbourne’s average temperature had decreased in January but later on grew substantially in July.
In January, both Paris and Boston’s average temperature were around 5°C, but then Paris started to grow marginally by around 3 to 4°C each month till July, while Boston suddenly to surge by around 7°C per month and reached to its peak at around 22°C in July. It is seen that Paris stayed at approximately 24°C for a month, and then started to recover significantly by around 4°C every month till the end of the year, while Boston also started to recover but with a more dramatically declination by around 7°C every month and hit a low at 5°C in December.
Melbourne had the highest average temperature among the other cities at approximately 26°C
in January, but then went down slowly by around 1°C every month. Starting from March, the declination was becoming greater and fall to its lowest point at around 16°C in July. Afterwards, the average temperature started te recover by around 2 to 4°C each month till the end of the year.