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NCERT Solutions for Class 8 Maths Chapter 15 (Ex 15.3) Introduction to Graphs

NCERT Solutions for Class 8 Chapter 15 Introduction to Graphs -Free PDF Download

Free PDF download of NCERT Solutions Maths Class 8 Solutions Chapter 15 – Introduction to Graphs solved by Expert Maths Teachers on CoolGyan.Org. All Chapter 15 – Introduction to Graphs Questions with Solutions for NCERT to help you to revise complete Syllabus and Score More marks.
Maths Revision Notes for Class 8

Chapter NameIntroduction to Graphs
ChapterChapter 15
ExerciseExercise 15.3
ClassClass 8
SubjectMaths NCERT Solutions
BoardCBSE
TEXTBOOKCBSE NCERT
CategoryNCERT Solutions

NCERT SOLVED


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

(a) Cost of apples

No. of apples12345
Cost (in Rs.)510152025

(b) Distance travelled by a car

Time (in hours)6 a.m.7 a.m.8 a.m.9 a.m.
Distance (in km)4080120160

(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.

Deposit(inRs.)10002000300040005000
Simple Interest (inRs.)80160240320400

(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?

Ans.  (a)

(b) (i) The car covered 20 km distance.

(ii) It was 7.30 am, when it covered 100 km distance.

(c) (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)

Side of Square(in cm)233.556
Perimeter 

(in cm)

812142024

Is it a linear graph?

(ii)

Side of Square(in cm)23456
Area (in cm2)49162536

Is it a linear graph?

Ans. (i)  Yes, it is a linear graph.

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