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Sean has information about the height, in cm, and the weight, in kg, of each of ten rugby players - Edexcel - GCSE Maths - Question 3 - 2018 - Paper 2
Question 3
Sean has information about the height, in cm, and the weight, in kg, of each of ten rugby players. He is asked to draw a scatter graph and a line of best fit for th... show full transcript
Worked Solution & Example Answer:Sean has information about the height, in cm, and the weight, in kg, of each of ten rugby players - Edexcel - GCSE Maths - Question 3 - 2018 - Paper 2
Step 1
1. Identify the Issue with the Line of Best Fit
Answer
The line of best fit does not pass through the appropriate number of data points. A line of best fit should represent the general trend of the data but may not need to pass through every point. However, in this case, it doesn't follow the trend depicted by the scatter plot. This suggests that Sean's line does not accurately reflect the relationship between height and weight.
Step 2
2. Discuss the Scale of the Height Axis
Answer
The height axis starts at 140 cm instead of 0 cm, which can misrepresent the data visually. It’s advisable for graph axes to start at a reasonable point relevant to the data being represented, possibly starting lower than 140 cm in this context, in order to provide a clearer representation of the data trends.