1. Starter: What’s the connection?
Starter- Show graph memory size against number of songs. Discuss the connection between the iPod and the graph, what type of data could it represent? eg. memory size v number of songs. DISCUSS exponential sketch graph (next slide). Will return to this slide later on with some data. Students may need the addition of key words/clues

2. Number of songs Memory (Gb)
DISCUSS – Features of the graph, reinforce by putting the words they are using on a board or use show me boards

4. Slides 3-5 are available on the work sheet – graphs and statements, students match them with the graph
These laminated cards around the room with students choosing the correct statement and putting it onto the graph, allows teacher to assess visually

12. Match with the graphs Sales were at a minimum in May
Sales levelled off from July
Sales rose steadily over the year
Sales peaked in June
Sales remained the same
Sales increased sharply from June
Sales rose gradually through the year
Sales fell steadily throughout the year
Answers on next slide

13. Match with the graphs Sales were at a minimum out in May 8
Sales levelled off from July
Sales rose steadily over the year
Sales peaked in June
Sales remained the same
Sales increased sharply from June
Sales rose gradually through the year
Sales fell steadily throughout the year

14. Sketch graphs
Work sheet available – sketch graphs

15. What could these graphs represent?
Next three slides link the table to scientific examples

19. Other graph types
Slides for further discussion

24. Sketch a graph of this data
iPod Name
Capacity (GB)
Estimated Songs
iPod 3rd generation
10, 15, 30
2500, 3700,7 500
iPod 4th generation
10, 20, 40
2500, 5000, 10,000
Students sketch data, will have to tease out the independent variable, capacity, and dependent variable, number of songs

25. How would you describe the shape?

26. Describing graphs

28. or

30. Key words

31. slightly a little a lot sharply suddenly steeply gradually gently steadily
Fell
Declined
Dropped
Decreased
Rose
Went up
Increased
reached a peak
peaked
reached their highest level
fell to a low
maximum
minimum
remained steady
were unchanged
did not change
remained constant
remained stable
stabilized
Directly proportional
Exponential