Mathematics – Class 8 – Chapter 15 – Introduction to Graphs – Exercise 15.3 – NCERT Exercise Solution

1. Draw the graphs for the following tables of values, with suitable scales on the axes.

(a) Cost of apples

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

Solution:

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

(b) Distance travelled by a car

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

(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?

Solution:

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

(i) The car covered 20 km distance during the period 7:30 a.m to 8 a.m.

(ii) It was 7:30 a.m.

(c) Interest on deposits for a year.

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

(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?

Solution:

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

(i) Yes, the graph passes through the origin.

(ii) For a year the Interest on Rs. 2500 is Rs. 200.

(iii) Rs. 3500 should be deposited for interest of Rs. 280

2. Draw a graph for the following

(i)

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

Is it a linear graph?

Solution:

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

Yes, it is linear graph

(ii)

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

Is it a linear graph?

Solution:

Mathematics - Class 8 - Chapter 15 - Introduction to Graphs - Exercise 15.3 - NCERT Exercise Solution

No, it is not a linear graph because the graph does not provide a straight line.

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