## Book: NCERT - Mathematics

### Chapter: 15. Introduction to Graphs

#### Subject: Maths - Class 8th

##### Q. No. 1 of Exercises 15.1

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##### The following graph shows the temperature of a patient in a hospital, recorded every hour.A. What was the patient’s temperature at 1 p.m?B. When was the patient’s temperature 38.5° C?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 1.30 p.m.? How did you arrive at your answer?E. During which periods did the patients’ temperature showed an upward trend?

A. The patient’s temperature at 1 p.m. was 36.5˚C

B. The patient’s temperature 38.5° C12:00 Noon

C. The patient’s temperature was same at 1:00 PM and 2:00 PM

D. The graph between the times 1p.m. and 2p.m. is parallel to x-axis. The temperature at 1p.m. and 2p.m. is 36.50c.

Hence, the temperature at 1:30p.m.is 36.50C.

E. During the following period the patients’ temperature showed an upward trend:

From 9:00am to 10:00am, 10:00am to 11:00 AM and from 2:00 to 3:00 PM

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