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

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

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

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

Match with the graphs Sales were at a minimum out in May 8 Sales levelled off from July 5 Sales rose steadily over the year 1 Sales peaked in June 7 Sales remained the same 3 Sales increased sharply from June 4 Sales rose gradually through the year 2 Sales fell steadily throughout the year 6

Sketch graphs Work sheet available – sketch graphs

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

Other graph types Slides 21-23 for further discussion

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

How would you describe the shape?

Describing graphs

or

Key words

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