Week 2 Understand and use statistics: Graphs and charts Functional MATHS Week 2 Understand and use statistics: Graphs and charts

To warm up……. Can you answer all 10 questions on this week’s number?

Reminder: What you need Pen(s) Pencil Rubber Sharpener Ruler Calculator Protractor A4 lined paper Highlighter (optional) A4 ring binder (provided) Pens Lined A4 paper Calculator Ruler Pencil Geometry Set Folder

(the last week of term before Easter) Reminder: The Exam Your Maths exam will be between Friday 23rd March and Thursday 29th March. (the last week of term before Easter)

Contact Details Gemma Bazzoni g.bazzoni@eastcoast.ac.uk Staff Room 117 (first floor) Find us on Facebook – Lowestoft Maths Follow us on Twitter - #LowestoftMaths

Today’s plan: Charts & Graphs Part 1 of your diagnostic (Number section)

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To kick off what we are doing today… On your desk are some post-it notes…. Using as many post-it notes as you need, can you draw a quick sketch (with label) of how many different ways you already know of to represent data. Only draw one per post-it note! Stick these on the white board in columns

Graphs and Charts Scatter graphs Two way tables Tally charts Pictograms Bar charts Pie charts Line graphs

Tally Charts A tally chart provides a quick method of recording data as events happen Tally marks are drawn as vertical strokes – I - until there are four. Then the fifth stroke is drawn across the previous four IIII The advantage of this method of tallying is that objects can be counted quickly and easily at the end

Your turn! You will be keeping tally of different coloured cars There are 4 stages in total At the end you need to add all totals up and complete the grand total Good Luck!!

Make a copy of the table below Tally Count Green Car Blue Car Red Car Yellow Car

Tallying

End of Stage 1

Results – Stage 1 Tally Count Green Car |||| ||| 8 Blue Car |||| || 7 |||| ||| 8 Blue Car |||| || 7 Red Car Yellow Car |||| |||| 9

End of Stage 2

End of Stage 3

End of Stage 4

Results – Grand Total Tally Frequency Green Car 45 Blue Car 30 Red Car 38 Yellow Car 36

Bar Charts

Your turn! Aunts Uncles Cousins Sisters Brothers Nephews Nieces Write down how many you have of the following: Aunts Uncles Cousins Sisters Brothers Nephews Nieces

Your turn! Using your data create a bar chart Ensure you include everything! Once you have done please pair up with someone and compare your graphs – you need to write one statement each about your graphs

Scattergraph

Number of ice-creams sold Scattergraph Mr. Softee often buys too much or too little ice-cream from the wholesalers, and therefore does not make as much profit as he'd like to. He decides to record how many ice-creams he sells over a number of days to see whether there is a link between the temperature and the number of ice-creams sold. Temperature (°C) 21 26 15 23 18 29 20 27 22 17 30 19 Number of ice-creams sold 70 86 50 80 58 96 66 92 74 54 100 62

Number of ice-creams sold Temperature (°C) 21 26 15 23 18 29 20 27 22 17 30 19 Number of ice-creams sold 70 86 50 80 58 96 66 92 74 54 100 62 First decide on the scale for your axes. Highest x value = 30 Lowest x value = 15 Highest y value = 100 Lowest y value = 50

Number of ice-creams sold 70 86 50 80 58 96 66 92 74 54 100 62 Temperature (°C) 21 26 15 23 18 29 20 27 22 17 30 19 Number of ice-creams sold 70 86 50 80 58 96 66 92 74 54 100 62 Plot the values on your axes, x first, then y. 100 Number of ice-creams sold 90 80 70 60 50 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Temperature (°C)

Number of ice-creams sold 70 86 50 80 58 96 66 92 74 54 100 62 Temperature (°C) 21 26 15 23 18 29 20 27 22 17 30 19 Number of ice-creams sold 70 86 50 80 58 96 66 92 74 54 100 62 Draw a line of best fit. 100 Number of ice-creams sold 90 80 70 60 50 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Temperature (°C)

Number of ice-creams sold 100 Number of ice-creams sold 90 80 70 60 50 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Temperature (°C) Mr. Softee has watched the weather forecast and the temperature is going to be 25°C. Estimate how many ice creams he can expect to sell. Identify 25°C. Draw a line to meet the line of best fit… Then to the other axis. Estimate the value… Mr. Softee should expect to sell 83 ice creams.

Pictogram Pictograms (or pictographs) show the data as pictures. The pictures represent a number of items The Pictogram it must also have a Key, for it to make sense Pictograms are not usually the best graph to use, because data can be more easily represented in bar graphs

Write down how many of each colour Smarties there are Pictograms Write down how many of each colour Smarties there are

Line Graphs Line graphs are used to show direction, or change in direction They tell us what happens over a period of time You mark (plot) the data on the graph with points or crosses When drawing a graph, it is important that you use the correct scale

Line Graphs

Pie Charts

Every graph needs:

Two Way Tables What are they?

Diagnostic Please complete the first part of the diagnostic (Number section) You will have 30 minutes to complete as much as you can

Homework Please complete and hand this to me next week – we will go over the answers at the start of the lesson!

Plenary with Post-its On a piece of paper please write down and complete the following sentence – I wish my maths teacher knew ………………..… about me