Challenge Question
When do we draw a line of best fit and what can we use it for? Why is it not always appropriate to draw a line of best fit?
Learning Targets
Beginning
To be able to demonstrate how to plot a scatter graph and explain what this can show us.
Developing
To be able to demonstrate when and how to draw a line of best fit on a scatter diagram.
Resources
Activity 1
Plot each set of data using the Number app. Sketch the general shape the points form.
What affects Ice Cream Sales
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNfd8XA3H_a9nafILCJ8MeE1cAJkwG9Q3x9VhuMz38fLPXayn87j-L1N-3PdDffK2Ofton2ms8-no9IcpQnN0UvJn2lnNdhKHq_R3wVtkKJH6YdeYeVPR6A6Np9JINv9fN6ibUI3H1oX8t/s640/Screen+shot+2012-07-11+at+23.18.09.png)
Activity 2
Drawing and using the Line of Best Fit.
Lines of Best Fit
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDOlFJFcoWgYRqePk0QMx8pnl2HT51YzaxFzuv1qICiX8FePqu8QYOJsYn9FNj6qcbPiKuAE1zznoyejdX6ZRi-V4a9bQGldqj3mSVHSBtZDNM0lSAk7y1UMXVBsXugvikszM3Ic97hVgr/s640/Screen+shot+2012-07-06+at+09.15.08.png)
Activity 3
What can you find out about these planes.
Activity 4
Drawing your own Scatter Graph:
Taxi Drivers
To be able to demonstrate how to plot a scatter graph and explain what this can show us.
Developing
To be able to demonstrate when and how to draw a line of best fit on a scatter diagram.
Mastering
Able to interpret a line of best fit and recognise the different types of correlation.
Able to interpret a line of best fit and recognise the different types of correlation.
Resources
Activity 1
Plot each set of data using the Number app. Sketch the general shape the points form.
What affects Ice Cream Sales
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNfd8XA3H_a9nafILCJ8MeE1cAJkwG9Q3x9VhuMz38fLPXayn87j-L1N-3PdDffK2Ofton2ms8-no9IcpQnN0UvJn2lnNdhKHq_R3wVtkKJH6YdeYeVPR6A6Np9JINv9fN6ibUI3H1oX8t/s640/Screen+shot+2012-07-11+at+23.18.09.png)
Activity 2
Drawing and using the Line of Best Fit.
Lines of Best Fit
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgDOlFJFcoWgYRqePk0QMx8pnl2HT51YzaxFzuv1qICiX8FePqu8QYOJsYn9FNj6qcbPiKuAE1zznoyejdX6ZRi-V4a9bQGldqj3mSVHSBtZDNM0lSAk7y1UMXVBsXugvikszM3Ic97hVgr/s640/Screen+shot+2012-07-06+at+09.15.08.png)
Activity 3
What can you find out about these planes.
Activity 4
Drawing your own Scatter Graph:
Taxi Drivers
Activity 5
Book Review
Homework