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Maths Improvers Blended Learning1 Types of graphs Level 1 Level 2

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Maths Improvers Blended Learning2 Why do we use graphs? To display collected information (data) in a visual way Lots of information can be displayed in one graph To make things simpler.

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Maths Improvers Blended Learning3 What are the most common types of graph? Line graph Bar chart Pie chart Pictogram Scatter graph or scatter plot.

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Maths Improvers Blended Learning4 Other ways to show data In a list As a tally In a frequency table ChocolateVanillaMintPistachioMelonFudge 884361

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Maths Improvers Blended Learning5 Line graph

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Maths Improvers Blended Learning6 Line graph 2

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Maths Improvers Blended Learning7 Bar chart

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Maths Improvers Blended Learning8 Cumulative bar chart

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Maths Improvers Blended Learning9 Comparative bar chart

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Maths Improvers Blended Learning10 Bar graph 2 showing data for 2 years www.dictionary.laborlawtalk.com/bar_chart

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Maths Improvers Blended Learning11 Pie Chart

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Maths Improvers Blended Learning12 So - what does a graph need? A title A label across (the x-axis) A label up the side (the y-axis) Numbers to show amounts (scale) Data plotted

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Maths Improvers Blended Learning13 Y axis Parts of a line graph or bar chart – the essentials! X axis Label for the y axis Label for the x axis Graph Title

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Maths Improvers Blended Learning14 So - what does a pie chart need? A title A key (or legend) Data plotted as sectors (slices of the pie)

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Maths Improvers Blended Learning15 Parts of a pie chart – the essentials! A Key (legend) Sectors

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Maths Improvers Blended Learning16 So - what does a pictogram need? A title A key (or legend) Minimum labelling (one axis only) Data plotted as graphics

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Maths Improvers Blended Learning17 A very simple (edible) pictogram!

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Maths Improvers Blended Learning18 Computer generated pictogram www.kudlian.net

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Maths Improvers Blended Learning19 So - what does a scatter graph need? A title A label across (the x-axis) A label up the side (the y-axis) Numbers to show amounts Two sets of bivariate data plotted Bivariate data is pairs of information from one source eg height and weight (growth chart)

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Maths Improvers Blended Learning20 Scatter graph or plot www.gifted.uconn.edu

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Maths Improvers Blended Learning21 Scatter graph or plot www.graphicsserver.com

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Maths Improvers Blended Learning22 Which one to use Line graphs Observing trends over time Bar charts Seeing which is most/least Comparing one thing with another Pie charts Parts of a whole Data in percentages

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Maths Improvers Blended Learning23 Pictogram Potentially non-mathematical Easy to read Can simplify very large numbers Scatter graphs Paired data (height/weight; mileage/age of car; study/test results)

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Maths Improvers Blended Learning24 Other graphs Frequency polygon A line on a graph joins the midpoints of histogram bars (looks like bar chart and line graph together) www.gseis.ucla.edu

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Maths Improvers Blended Learning25 Other graphs Block chart Similar to a bar chart – but often simplified. Almost a bridge between bar chart and pictogram www.elvethamheath.hants. sch.uk

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Maths Improvers Blended Learning26 Useful words Frequency table A table with columns and rows showing the number of times an item or event occurs. http://amazing-space.stsci.edu

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Maths Improvers Blended Learning27 Useful words Tally, or bar gate A method of recording items using a mark, usually a line or stick. Tallies are recorded in sets of 5 for easy addition. 8

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Maths Improvers Blended Learning28 Useful words Discrete data: data resulting from a count of separate items or events, e.g. number of people, colours. On a bar chart the bars are separate. Continuous data: data that can take any value e.g. height, temperature and time. On a bar chart the bars are next to each other.

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Maths Improvers Blended Learning29 Useful words Axis X or horizontal axis Y or vertical axis X Y

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Maths Improvers Blended Learning30 How are you doing? Think about these questions Do you feel confident with this topic? If you are not confident, re-run the slides. Or look for more on this topic in Section 10: Graphs and Averages

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Maths Improvers Blended Learning31 Credits: Graphs generated in MS Excel unless stated on slide - See individual slides for URLs/photo credits GNU Free Documentation License Click to exit

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