1. We can present data in a graphical form as it is easier to see what is goingon, or to spot patterns, rather than looking at raw numbers in a table or in aspreadsheet. Graphs are visual images which are quick and easy to read.

2. Raw data is collected and recorded in a table. Eye colour Blue Black Brown Grey Hazel Green Class 83 1524 0 One A simple table is quite easy to read. What is the most popular eye colour for this class? 3. There are 5 main types of graphs; 1. pictogram 2. bar chart. 3. comparative graph 4. pie chart 5. line graph 4. You used pictograms in graphstart. This is a simple way of representing data with a picture.Y axisThis tellsus thenumberof pets.X axis. This tells us the type of pets. 5. Can you think what the advantages anddisadvantages of a pictogram may be? * Easy to read * simple data * Quick * limited topics * All languages* suits smaller numbers 6. A bar chart uses columns or blocks to show data values. Thistype of chart is useful for showing bigger numbers and formaking quick comparisons.Class 1Y axis 16usually 1412represents10 8the values 6tat change.4 2 0Children BlueBlack Brown Grey Hazel Greenwith eye Class 1colour.X axis represents the category choices,the data that does not change. 7. However, if you survey more classes, there is moredata to wade through.......Blue Black Brown Grey Hazel GreenClass One 83 1524 0Class Two 10 1 1460 1Class Three 18 0 3 01 2Class Four14 3 9 57 0 Now which is the most popular eye colour? It is much harder to spot the answers. 8. A comparative graph is used to compare setsof data. It groups results for the samecategory.2018161412 Class 110 class 28class 36class 44 20 Blue Black Brown Grey Hazel Green 9. A pie chart is a circle made from segments. Each segmentrepresents a proportion. NOT that sort of PIE!!!! 10. THIS type of PIE! The proportions of a pie chart are usuallyshown as a percentage. Class 1BlueBlackThis is called aBrownlegend it uses aGrey colour code toHazelGreen show the categories. 11. Pie charts do not show exact values, butpercentages. They are really useful whencomparing a large sample with a smallsample. It would be difficult, as a bar chart, to compare class eye colour with a top value of 30 children to a whole school survey, where there will be over 200 answers. 12. A line graph is used when the value beingmeasured is the same. It is similar to a barchart, but samples data at intervals.Line graphs can track when values arehigh or low. One example is aweather chart, showing the sunshineor rainfall for the year. Each monthwould be an interval measure.Business use line graphs to track theirsales. 13. Each graph type has its own advantages anddisadvantages. You need to think about yourpurpose and audience before choosingwhich style to use.Can you remember the five main types of graphs?