Exercise 26E
Question 1
Make a line graph for the information in each table below.
1. Scores in six Mathematics tests are as follows:
| Test | 1 | 2 | 3 | 4 | 5 | 6 |
| Score | 70 | 80 | 75 | 90 | 80 | 95 |
Question 2
A certain amount of water is heated and the temperatures at different intervals of time were observed as follows
| Time (t) in minutes | 0 | 1 | 5 | 9 | 10 |
| Temperature (T) in °C | 10 | 20 | 60 | 100 | 100 |
Draw a temperature time graph from t=0 minutes to t=15 minutes. Use your graph to answer the following question .
(i) What is the temperature of water at $t=7$ minutes?
(ii) What is the temperature after 12 minutes?
(iii) After how many minutes the temperature is $70^{\circ} \mathrm{C}$ ?
(iv) After how many minutes of heating, the temperature remains constant? Why is it so?
Question 3
The graph given here shows the life insurance premiums for different age groups. Read the graph and then answer the following questions.
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(i) Find the annual premium for a person aged 35 years.
(ii) Find the annual premium for a person aged 45 years.
(iii) How much more premium a man aged 50 years pays against a man of age 30 years?
(iv) Find the average of annual premium paid by the persons aged $30,35,40$ and 50 years.
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