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Example 12: (Multiple of Numbers)

Draw a graph to represent the multiples of 3 by taking numbers on x-axis and its multiples on
y-axis. From the graph, find the multiple of 3 when number is 4.

Solution: Let the numbers be 0, 1, 3, 5, then the multiples of 3 will be as follows:

Number (x) Multiple (3x) Y Scale: On x-axis 1 unit = 1
15 On y-axis 1 unit = 3
0 0
1 3 12

3 9 9
Multiples of 3 6
5 15

3

X
0 1 2 3 4 5 6
From the graph we find that the multiple of 3
for number 4 is 12. Numbers

Line Graph

A line graph displays data that changes continuously over periods of time. The data points in this
graph are joined by lines to show changes that happened consistently throughout time.
Example 13: (Time and Temperature)

When Ratnesh fell sick, his doctor maintained a record of his body temperature, taken every four
hours as follows:

Time 6 a.m. 10 a.m. 2 p.m. 6 p.m. 10 p.m.
Temperature ( in °C) 37 40 38 36 35
Draw a graph to represent the above data.

Solution: Y Scale:On x-axis, 1 unit = 4 h
On y-axis, 1 unit = 2° C
40

38 A kink in a graph is a zig-zag line or

Temperature (in °C) 34 Note: break on the axis that indicates the
36

first class interval does not start at zero
32

30

6 a.m. 10 a.m. 2 p.m. 6 p.m. 10 p.m.
0 X
Time
Here, we observe that, the graph is not linear, but a line graph.

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