A football coach measured the heights and weights of 12 players, The data is shown below.
| Height (cm) | 170 | 170 | 175 | 175 | 180 | 180 | 180 | 180 | 185 | 185 | 190 | 190 |
| Weight (kg) | 67 | 63 | 73 | 72 | 78 | 79 | 81 | 82 | 87 | 88 | 97 | 93 |
Draw a scatter graph for this information.
The equation of the regression line is w=1.50h−190w = 1.50h - 190w=1.50h−190. Give an interpretation of the gradient of this regression line.
Use the equation of the regression line to estimate the weight of a player who is 175cm tall.
Comment on the reliability of your estimate in part (c), giving a reason for your answer.
46 exam-style questions on Edexcel A Level Maths Correlation, covering 4.1 Correlation and 4.2 Linear Regression. Each one has a worked solution and a mark scheme showing where the marks go.