NCERT Class 8 Maths Chapter 15 Introduction to Graphs Exercise 15.3

Chapter 15 Introduction to Graphs Exercise 15.3

Question 1: Draw the graphs for the following tables of values, with suitable scales on the axes.
a) Cost of apples

Question 1 a)

b) Distance travelled by car

Question 1 b)

i) How much distance did the car cover during the period 7.30 a.m. to 8 a.m.?
ii) What was the time when the car had covered a distance of 100 km since it’s start?
c) Interest on deposits for a year.

Question 1 c)

i) Does the graph pass through the origin?
ii) Use the graph to find the interest on Rs 2500 for a year.
iii) To get an interest of Rs 280 per year, how much money should be deposited?
Answer:

a)

Question 1 a) Answer


b)

Question 1 b) Answer

i) The car covered 20 km during the period 7.30 a.m. to 8 a.m.
ii) The time when the car had covered a distance of 100 km since its start was 7:30 a.m.

c)

Question 1 c) Answer

i) Yes, the graph passes through the origin (0, 0).
ii) The interest received for deposit of ₹2500 a year is ₹200.
iii) To get an interest of ₹280 per year, ₹3500 should be deposited.

Question 2: Draw a graph for the following.
i)

Question 2 a)

Is it a linear graph?
ii)

Question 2 b)

Is it a linear graph?
Answer:

i)

Question 2 a) Answer

Yes, it is a linear graph.

ii)

Question 2 b) Answer

No, it is not a linear graph because it is not a straight unbroken line.

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