The line graph shows the temperature at different times of a day in a city.
- At what time was the temperature of the city the highest?
- During which 2-hour interval did the temperature decrease by 9°C? (Eg 12 p.m, 2 p.m)
(a)
30°C is the highest and it is at 1 p.m.
(b)
The temperatures are 18°C, 21°C, 12°C, 30°C, 24°C, 18°C and 15°C.
Difference in the temperature between 9 a.m. and 11 a.m
= 21°C - 12°C
= 9°C
2-hour interval that the temperature decreased by 9°C: 9 a.m., 11 a.m.
Answer(s): (a) 1 p.m.; (b) 9 a.m., 11 a.m.