This task is about making and reading a graph.
One sunny day in February a group of students measured the length of the shadow made by a stick at different times during the day. Here are their results:
| Time of day |
Length of shadow, in
centimetres (cm) |
| 10 a.m. | 53 |
| 11 a.m. | 37 |
| 1 p.m. | 20 |
| 1.30 p.m. | 18 |
| 2 p.m. | 20 |
| 3 p.m. | 26 |
| 4 p.m. | 37 |
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a) |
Draw a line graph to show these results. |
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| b) | From the graph you have drawn answer the following questions. | |
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i) ii) |
How long would the shadow length be at 12 noon? ____________ cm What do you notice about the time of day and the length of the shadow? |
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| c) |
What causes the shadow length change during the day?
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| d) |
Some students made a simple sundial using a pencil and a sheet of paper as shown above. Their sundial made the shadow E at 9:00 a.m.
Which dotted line shows where the shadow will fall at 11:00 a.m.?
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(A) (B) (C) (D) |
A B C D |
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