Page 181 - Mathematics Coursebook
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7.1 Simplifying fractions
19 Interpreting and discussing results
What is the purpose of drawing charts Key words
or diagrams, when you can just look at 7+( :21'(56 2) 520(
7+( :21'(56 2) 520(
the data? Make sure you learn and
Imagine you were going to book understand these key words:
a holiday. If you look in a holiday pictogram
brochure you will o!en see graphs and key
charts that show you what the weather is bar chart
usually like at the holiday destinations. bar-line graph
It is much easier to get the information frequency diagram
you need from a graph or chart than it is pie chart
from a long list of data. ȱ¢ȱȱȱ¢ sectors
¡ǰȱ ǰȱ
For example, suppose you want to book
a holiday to Rome, but you want to go Average monthly rainfall in Rome
when there is unlikely to be much rain.
If you look at the chart on the right, you 120
100
can quickly and easily see that July has Rainfall (mm) 80
the least amount of rain, and also that 60
May, June and August do not have a lot 40
20
of rain either. 0 Jan Feb MarApr MayJun Jul Aug Sep Oct NovDec
October, November and December Month
are the months to avoid as this is when
Rome has most of its rain. Average monthly temperature in Rome
If you also wanted to go to Rome when
the temperature wasn’t too high, you 30
25
could use this temperature chart. Temperature (°C) 20
Suppose that you wanted the 15
10
temperature to be lower than 20 °C: 5
you can see that June, July, August and 0 Jan Feb MarApr MayJun Jul Aug Sep Oct NovDec
September are too hot, but the other Month
months are suitable.
Looking at both charts you would
probably decide to go to Rome
in May as there isn’t very much rain
and the temperature is less than 20 °C.
#e Colosseum, Rome.
180 19 Interpreting and discussing results
