NCERT Solutions for Maths Class 8 Introduction to Graphs, this chapter includes all the questions provided as per the new revised Class 8 syllabus by CBSE. This chapter helps students to improve reasoning skills, have analytical thinking, quickens the mind, generates practicality and also can be applied every day. NCERT Class 8 exercise 15.3 mainly based on some important applications of graphs. Students can download the pdf of Maths Class 8 Chapter 15 NCERT Solutions and start practising offline.
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Access Answers to NCERT Class 8 Maths Chapter 15 Introduction to Graphs Exercise 15.3 Page number 247
1. Draw the graphs for the following tables of values, with suitable scales on the axes.
(a) Cost of apples
(b) Distance travelled by a car
(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.
(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?
Mark “number of apples” on x-axis and “cost” on y-axis. The graph is
(b) Represent the “time” on x-axis and “distance” on y-axis.
(i) The car covered 20 km distance
(ii) It was 7.30 am, when it covered 100 km distance.
(c) Represent “Deposit” on y-axis and “simple interest” on x-axis.
(i) Yes, the graph passes through the origin.
(ii) Interest on Rs. 2500 is Rs. 200 for a year.
(iii) Rs. 3500 should be deposited for interest of Rs. 280
2. Draw a graph for the following
(i) Yes, it is linear graph
(ii) No, it is not a linear graph because the graph does not provide a straight line.
NCERT Class 8 Maths Chapter 15 Introduction to Graphs Exercise 15.3, contains some applications of graphs. In this section, students will see how one quantity affects another. For example, if more electricity is consumed, the bill is bound to be high. If less electricity is used, then the bill will be easily manageable. It shows the relation between dependent and independent variables, which can be easily plotted through a graph.