Draw the scatter diagram for the given pair of variables and understand the type of correlation between them.
| No. of Students | Marks obtained (out of 100) |
| 12 | 40-50 |
| 10 | 50-60 |
| 8 | 60-70 |
| 7 | 70-80 |
| 5 | 80-90 |
| 2 | 90-100 |
Below is a table of 11 student’s scores out of 100 on their Maths and English tests. Plot a scatter graph from this data.
2) Rey recorded the heights and weights of her students in the table below.
a) Draw a scatter graph of this data and state the type and strength of correlation.
b) Draw a line of best fit and use it to predict how much someone who is 190cm would weigh. Explain why this might not be an accurate prediction.
The scatter graph shows the maths mark and the art mark for each of 15 students.
(a) What type of correlation does the scatter graph show?
(b) Draw a line of best fit on the scatter graph?
Sarah has not got a maths mark. Her art mark is 23.
(c) Use your line of best fit to estimate a maths mark for Sarah.
The scatter graph shows information about the height and the arm length of each of 8 students in Year 11.
(a) What type of correlation does this scatter graph show?
A different student in Year 11 has a height of 148 cm.
(b) Estimate the arm length of this student.
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