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 Name | Introduction to Graphs |
| Chapter | Chapter 15 |
| Exercise | Exercise 15.3 |
| Class | Class 8 |
| Subject | Maths NCERT Solutions |
| Board | CBSE |
| TEXTBOOK | CBSE NCERT |
| Category | NCERT 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 apples | 1 | 2 | 3 | 4 | 5 |
| Cost (in Rs.) | 5 | 10 | 15 | 20 | 25 |
(b) Distance travelled by a car
| Time (in hours) | 6 a.m. | 7 a.m. | 8 a.m. | 9 a.m. |
| Distance (in km) | 40 | 80 | 120 | 160 |
(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.) | 1000 | 2000 | 3000 | 4000 | 5000 |
| Simple Interest (inRs.) | 80 | 160 | 240 | 320 | 400 |
(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) | 2 | 3 | 3.5 | 5 | 6 |
| Perimeter (in cm) | 8 | 12 | 14 | 20 | 24 |
Is it a linear graph?
(ii)
| Side of Square(in cm) | 2 | 3 | 4 | 5 | 6 |
| Area (in cm2) | 4 | 9 | 16 | 25 | 36 |
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.
