1. Scatter Graphs Aim: To draw scatter graphs and a line of best fit. We shall look at plotting pairs of point on a graph and discovering if there is a relationship between the pairs of number. Test result Listening in class Detentions Home work complete English Test Hold breath under water

2. To place the line of best fit we need to calculate the mean. Lets try calculating the mean with this set of data. 1 st Set3 9 6 4 8 2 nd Set11 13 14 15 17 Mean = 6 Mean = 14

3. 100 90 80 70 60 50 40 30 20 10 100908070605040302010 0 Maths24 53 79 93 68 43 59 41 85 75 Science33 62 84 84 74 36 31 46 80 80 Look at the following Maths and Science test of Ten Pupils. First we need to draw our axis. Maths Science Next we need to label axis. We then need to plot our points.

4. Line of best fit. To find the line of best fit we must now calculate the mean of each set of data. Maths24 53 79 93 68 43 59 41 85 75 Add the numbers up to get the total = 620 There are 10 numbers. The mean is therefore 620 ÷ 10 = 62

5. Line of best fit. To find the line of best fit we must now calculate the mean of each set of data. Science33 62 84 84 74 36 31 46 80 80 Add the numbers up to get the total = 610 There are 10 numbers. The mean is therefore 610 ÷ 10 = 61 Maths mean =62 Science mean =61

6. 100 90 80 70 60 50 40 30 20 10 100908070605040302010 0 Maths Science Maths mean =62 Science mean =61 This give us a point to plot! Our line of best fit goes through the mean for both sets of data! So which line is the best fit? The line should run through the data, with each point being as close as possible to the line.

7. Scatter Graphs Aim: To draw scatter graphs and a line of best fit. 100 90 80 70 60 50 40 30 20 10 100908070605040302010 0 Maths Science Mean is: TOTAL Number Line of best fit should be as close as possible to all points. Positive Correlation Negative Correlation No Correlation

8. PLENARY ABC