Year 8 - Scatter Graph Lesson
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Interactive Scatter Graph Lesson Rules: 1.Treat this as you would treat a normal Maths lesson including Noise Levels. 2.Anybody who is found to be doing anything other than the Interactive Lesson will have an instant Lunchtime Detention. 3.Ask for help if needed. 4.Hand your work in at the end.
Transcript of Year 8 - Scatter Graph Lesson
Interactive Scatter Graph Lesson
Rules:1.Treat this as you would treat a normal Maths
lesson including Noise Levels.2.Anybody who is found to be doing anything
other than the Interactive Lesson will have an instant Lunchtime Detention.
3.Ask for help if needed.4.Hand your work in at the end.
Using your grid on your answer sheet, plot a scatter graph from the data given.
Check your Scatter Graph carefully and then click to move on.
Your Scatter Graph should look something like the one below. If you had trouble when plotting this graph please ask for help.
To help us identify whether or not a link exists we can plot a “Line of Best Fit.”
Below is an example of a good “Line of Best Fit.”
There is no exact answer when plotting a line of best fit but it is
useful to try and have equal points on both sides of your line.
ADD A LINE OF BEST FIT TO YOUR SCATTER DIAGRAM
The fact that we can draw a line of best fit tells us
that a link does exist between Maths scores
and Art Scores.
We call this link on a graph:
CORRELATION
Now answer the questions at the bottom of Page 1.
In this specific case we have a
NEGATIVE CORRELATION between Maths and Art.
In general, the better you do in Maths, the worse you would perform in Art.
Or as one result increases, the other decreases.
On the space on your answer sheet think of another example of a NEGATIVE CORRELATION.
Another example of a NEGATIVE CORRELATION could be, “The more you eat the less hungry you feel”
Or“The more you revise the less likely you are to Fail.”
Using Scatter Graphs to Predict results.
We can use the graph to predict students scores quite accurately.
The blue dotted line is predicting a students Art score after we are told that they scored 40 in Maths.
If we read the Art score from this prediction we can see that they should score roughly 60 marks in Art.
On your answer sheet, using your Scatter Graph and Line of Best Fit,
predict the marks when the student scored:
a)90 in Maths
b) 80 in Art
On your answer sheet draw a LINE OF BEST FITand answer the questions which follow on your sheet.
Check your work then Click to move on.
Where would you put your line of best fit?
Please check over your work.When you are happy with it hand it in.
