Objectives
In a meaningful context, students will be able to:
- To explain the meaning of negative numbers. [N4.1]
- Sketch and interpret graphs which represent everyday situations. [A4.3]
- Make statements about time-related variation [S5.7]
Mathematics in the New Zealand Curriculum
The graph to the right shows the hourly temperatures for Queenstown on 16 July 2001
Interpreting graphs:
- What was the highest temperature recorded on 16 July 2001? At what time of the day did this occur?
- What was the temperature at 12.30 pm and at 5 am?
- When was the temperature 0°C?
- What was the coldest temperature recorded on 16 July 2001 and when was it recorded?
- Between which two times was the temperature rising?
- When was the temperature falling most rapidly?
- Write a paragraph describing how the temperature changed over the 24-hour period.
Understanding negative numbers:
- Explain what a temperature of -12°C means.
- If the temperature is 6°C and falls by 9°C, what is the new temperature?
- If the temperature is -5°C and falls a further 3°C, what is the new temperature?
- Which temperature is lowest: -8°C or -9°C?
- Write down a temperature that is 2 degrees warmer than -14°C.
