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These are the Transum resources related to the statement: "Linear correlation of bivariate data. Pearsonâ€™s product-moment correlation coefficient, r. Scatter diagrams; lines of best fit, by eye, passing through the mean point. Use of the equation of the regression line for prediction purposes. Interpret the meaning of the parameters, a and b, in a linear regression y=ax+b".

Here are some specific activities, investigations or visual aids we have picked out. Click anywhere in the grey area to access the resource.

- Cartoon Scatter Graph Place the cartoon characters on the scatter graph according to their height and age.
- Correlation Arrange the given statements in groups to show the type of correlation they have.
- Human Scatter Graphs Pupils move to positions in the room according to their data relative to the walls as axes.

Here are some exam-style questions on this statement:

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*The number of visitors to a cycle track and the number of drinks sold by a cafĂ© at the location are recorded in the table below.*" ... more - "
*The scatter graph shows the maximum temperature (*" ... more^{o}C) and the number of bowls of soup sold at a sandwich shop on twelve randomly selected days last year. - "
*The following table shows the relationship between the number of workers and the amount of time in minutes it takes them to harvest the sugar cane in a particular field.*" ... more - "
*The following table shows the amount of diesel required by a train to travel certain distances.*" ... more - "
*The following table shows the mean weight in kilograms of members of a group of young children of various ages.*" ... more - "
*The following table shows the average number of hours per night sleeping by seven men and their youngest child.*" ... more - "
*The following table shows the average weights for given heights in a population of men.*" ... more - "
*As part of a conservation project, Darren was asked to measure the circumference of trees that were growing at different distances from a beach.**His results are shown in the following table.*" ... more - "
*In a survey of insect life near a stream, a student collected data about the number of different insect species \((y)\) that were found at different distances \((x)\) in metres from the stream.*" ... more - "
*A pair of twins, Percy and Patsy, take Maths assessment tests each week. Their teacher records their scores in this table:*" ... more - "
*The table below shows the scores for 12 students on two Mathematic exam papers. For the first paper calculators were allowed and for the second paper they were not.*" ... more

Click on a topic below for suggested lesson starters, resources and activities from Transum.

If you use the TI-Nspire calculator you can find instructions for finding the regression line on the GDC Essentials page. The equation of that line can then be used for prediction purposes.

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