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9. Sucheta is pursuing Nursing course from a medical university. During her practical training
she was assigned to draw the patient’s body temperature graph at the interval of 1 hour. She
started taking body temperature reading with clinical thermometer in (°C) from 7 a.m. to 2 p.m.
The graph shows the temperature of patient recorded by her every hour. Case study
Read the graph and answer the following questions:

(a) What was the patient’s temperature at 11 a.m.?
(b) When was patient’s temperature 37°C?
(c) What is the timing when temperature remained constant?
(d) In which hour was the maximum increase in temperature recorded?

Y
Scale: On x-axis, 1 unit = 1 hour
40 On y-axis, 1 unit = 1 °C

39

38

Temperature (in °C) 36
37

35
34

X
7 8 9 10 11 12 1 2
a.m. a.m. a.m. a.m. a.m. noon p.m. p.m.
Time

Mental Maths
1. What are the coordinates of the origin?
2. What is the abscissa of the point (–5, 5)?
3. What is the ordinate of the point (6, 7)?
4. What is the ordinates of every point on x-axis?
5. On which axis or quadrant do the points (0, 3), (0, 5), (0, 6), (0, 10) lie?
6. Without plotting on the graph, state the quadrants or axes where the following points lie?
(a) A (3, 2) (b) B (– 1, –7) (c) C (–5, 0) (d) D (–6, 6)
(e) E (0, 4) (f) F (0, 0) (g) G (8, –6)

7. Explain the situation of movement of a car that is represented by the following distance-time graphs.
(a) (b)
Y
Distance Distance 3 2 A D

Time Time E
8. Obtain the coordinates of the points plotted on the graph given alongside. 1 C
B F X
(0, 0)
1 2 3 4

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