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Introduction To Graphs

Question
CBSEENMA8003547
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Read the following ‘time-temperature’ graph of a place and answer the questions given below.
(i) What was the temperature at 7 a.m.?
(ii) When the temperature was maximum?


(iii) When was the temperature 40°C?
(iv) During which period, the temperature remained constant?

Solution

(i) At 7 a.m., the temperature was 34° C.
(ii) The maximum temperature (44° C) was at 11 a.m.
(iii) At 10 a.m., the temperature was 40° C.
(iv) The temperature remained constant during 8 a.m. to 9 a.m.

Some More Questions From Introduction to Graphs Chapter

Can there be a time-temperature graph as follows? Justify your answer.

Ratana fell sick. Her doctor maintained a record of her hody temperature, taken every four hours. It is shown in the following time-temperature graph.
(a) During which period the temperature showed a rising trend?
(b) During which period the temperature showed a downward trend?
(c) At what time the temperature was highest?
(d) At what time the temperature was lowest?

Plot the following points on a graph sheet. Verify if they lie on a line:
(a) A (4, 0), B(4, 2), C(4, 6), D(4, 2.5)
(b) P(1, 1), Q(2, 2), R(3, 3), S(4, 4)
(c) K(2, 3), L(5, 3), M(5, 5), N(2, 5)

Draw the line passing through (2, 3) and (3, 2). Find the coordinates of the points at which this line meets the x-axis and y-axis.

Write the coordinates of the vertices of each of these adjoining Figures.

State whether True or False. Correct that are false.

The number of litres of petrol you buy to fill a car’s petrol tank will decide the amount you have to pay. Which is the independent variable here? Think about it.

The following table gives the quantity of petrol and its cost.


Plot a graph to show the data.
Use the graph to find how much petrol can be purchased for Rs 800.

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