Line Graphs
Line Graphs
TGM Original Questions
The line graph below shows the monthly average temperature of City A and City B.
- Find the highest and lowest monthly average temperatures in City A and City B over a year, and the months in which these temperatures occur.
- Find the number of months in which the average monthly temperature of City A is higher than 5°C.
The table below shows the difference between the monthly average temperature of City A and City B over a year.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Difference (°C) | 24.8 | 25.9 | 17.1 | 5.1 | 8.2 | 19.0 | 21.5 |
- Complete the table. Hence briefly describe the trend of changing of the difference between the monthly average temperature of the two cities in a year.
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Answer:(i) City A: highest \(25.9^\circ\text{C}\) in July, lowest \(-1.9^\circ\text{C}\) in February. City B: highest \(24.3^\circ\text{C}\) in December, lowest \(11.6^\circ\text{C}\) in July (ii) \(8\) months (iii) May–September: \(-4.6,-11.2,-14.3,-11.4,-3.0^\circ\text{C}\); the signed difference falls to July, then rises to December
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