# Ex 15.1, 1 - Chapter 15 Class 8 Introduction to Graphs

Last updated at July 24, 2018 by Teachoo

Last updated at July 24, 2018 by Teachoo

Transcript

Ex 15.1, 1 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. ? At 1 p.m. , temperature is 36.5° C. (b) When was the patient’s temperature 38.5° C? Temperature was 38.5° C at 12 noon. (c) The patient’s temperature was the same two times during the period given. What were these two times? The temperature was same at 1 pm and 2pm (d) What was the temperature at 1.30 p.m.? How did you arrive at your answer? 1:30 p.m. is the point on the middle of 1 p.m. & 2 p.m. From that point, we draw a line parallel to y-axis. The point where line touches the graph is the temperature at 1:30 p.m. ∴ Temperature at 1:30 p.m. = 36.5° C (e) During which periods did the patients’ temperature showed an upward trend? The patient’s temperature increased from 9am to 10am 10am to 11am 2pm to 3pm

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.