# 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?

Answer:

(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.

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