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.

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Presentation transcript:

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

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 Set nd Set Mean = 6 Mean = 14

Maths Science 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.

Line of best fit. To find the line of best fit we must now calculate the mean of each set of data. Maths Add the numbers up to get the total = 620 There are 10 numbers. The mean is therefore 620 ÷ 10 = 62

Line of best fit. To find the line of best fit we must now calculate the mean of each set of data. Science 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

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.

Scatter Graphs Aim: To draw scatter graphs and a line of best fit 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

PLENARY ABC