### eLearning Lesson 1 Task 1: Choice of graphs by Chan Shawn Kit(10)

• Among the 4 graphs (Line Graph, Bar Graphs, Pictograms, Pie Charts), identify ONE graph that is NOT an appropriate choice to represent the information?
• Why do you think it's not appropriate?
• What makes you think the 3 remaining graphs are appropriate?
• 1) Pie Charts
• 2) Certain percentages may have recurring decimals, eg. 19.9821092197. It is rounded off to the nearest decimal point then converted equivalent to 360 degree. It is hard to find the original decimal as we will have to refer to the legends and the data may not be accurate due to the recurring decimals.
• 3) They immediately show the data which are based on 100% and it is easier to study it.

#### 1 comment:

1. Your reasoning is based on accuracy in representating data (due to rounding off):

If the figures given, after calculating result in exact figures (where no rounding off is necessary), would PIE graph still be appropriate then?

Points to ponder...
What kind of information does PIE chart usually provide?
Does each type of graph serve a different purpose or it doesn't matter?

In the 3rd point, you mentioned "... based on 100%...". How would you know whether all (100%) data is represented in the charts? (especially in the absence of raw data)