NCERT Class 8 Mathematics Solutions: Chapter 15 –Introduction to Graph Exercise 15.1 Part 1

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Definition of Line Graph

Definition of Line Graph

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1. The following graph shows the temperature of a patient in a hospital, recorded every hour:

Line graph of Temperature vs Time

Line Graph of Temperature vs Time

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(a) What was the patient’s temperature at p.m.?

(b) When was the patient’s temperature?

(c) The patient’s temperature was the same two times during the period given. What were these two times?

(d) What was the temperature at? How did you arrive at your answer?

(e) During which periods did the patients’ temperature showed an upward trend?

Answer:

(a) The patient’s temperature was C at p.m.

(b) The patient’s temperature was at noon.

(c) The patient’s temperature was same at p.m. and p.m.

(d) The patient’s temperature at p.m. was [Because, the temperature of the patient was constant (I.e. from 1 p.m. to 2 p.m.]

(e) The patient’s temperature showed an upward trend from a.m. to a.m. and 2 p.m. to 3 p.m.