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

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

3. 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

4. (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)

5. Contact Details
Gemma Bazzoni Staff Room 117 (first floor) Find us on Facebook – Lowestoft Maths Follow us on Twitter - #LowestoftMaths

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

7. Feedback form

8. 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

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

10. 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

11. 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!!

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

13. Tallying

14. End of Stage 1

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

16. End of Stage 2

17. End of Stage 3

18. End of Stage 4

19. Results – Grand Total Tally Frequency Green Car 45 Blue Car 30 Red Car38
Yellow Car 36

20. Bar Charts

21. 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

22. 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

23. Scattergraph

24. 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

25. 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

26. 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)

27. 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)

28. 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.

29. 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

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

31. 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

32. Line Graphs

33. Pie Charts

34. Every graph needs:

35. Two Way Tables
What are they?

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

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

41. 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