8TH MATHS PART 2 CHAPTER 5 INTRODUCTION TO GRAPHS-3 EXERCISE 5.3

  NCERT 8TH MATHS PART 2 CHAPTER 5 INTRODUCTION TO GRAPHS-3 EXERCISE 5.3 SOLUTIONS

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?

Solution:

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

Solution:

(i) Yes, it is linear graph

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