NCERT Class 8 Mathematics Solutions: Chapter 15 – Introduction to Graph Exercise 15.1 Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Definition of Line Graph

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

Line Graph of Temperature vs Time

(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.

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