# NCERT Class 8 Mathematics Solutions: Chapter 15 – Introduction to Graph Exercise 15.3 Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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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 ₹) 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 ?

(ii) What was the time when the car had covered a distance of since it՚s start?

(iii) Interest on deposits for a year.

 Deposit (in ₹) 1000 2000 3000 4000 5000 Simple Interest (in ₹) 80 160 240 320 400

(i) Does the graph pass through the origin?

(ii) Use the graph to find the interest on for a year.

(iii) To get an interest of per year, how much money should be deposited?

(a)

(b)

(i) The car covered distance.

(ii) when the car covered a distance of the time is 7.30 am.

(c)

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

(ii) The midpoint between 2000 and 3000 is near ₹ 200, So, the Interest on for a year.

(iii) To get ₹ 80 per year one needs to deposit ₹ 1000

To get ₹ 1 per year one needs to deposits ₹

To get ₹ 280 per year one needs to deposits ₹

So, deposited for interest of .

1. Draw a graph for the following.

(i) Is it a line graph?

 Side of Square (in cm) 2 3 3.5 5 16 Perimeter (in cm) 8 12 14 20 24

(ii) Is it a linear graph?

 Side of Square (in cm) 2 3 4 5 6 Area (in ) 4 9 16 25 36

(i) Yes, it is a line graph.