I can use a graph to represent a multiplicative relationship and connect to other known representations.
I can use a graph to represent a multiplicative relationship and connect to other known representations.
Proportionality - Proportionality means when variables are in proportion if they have a constant multiplicative relationship.
Ratio - A ratio shows the relative sizes of two or more values and allows you to compare a part with another part in a whole.
Equivalent fractions - Two fractions are equivalent if they have the same value
Incorrectly drawing a scaled axis is common.
Use the approach where pupils count the number of intervals of the scale and divide the difference bewteen the intervals. For example, if there are 5 intervals and the difference is between 20 and 30, they divide 10 by 2, so each interval is 2
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20% of 500 - 100
30% of 870 - 261
10% of 750 - 75
30% of 650 - 195
60% of 940 - 564
5% of 60 - 3
34 marks - Grade C
34% - Grade D
45 marks - Grade B
45% - Approximately 29 marks
60 marks - Grade A
60% - Approximately 40 marks
