This key facts covers Key Facts About Scatter Graphs within Scatter Graphs for GCSE Mathematics. Revise Scatter Graphs in Statistics for GCSE Mathematics with 14 exam-style questions and 20 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 2 of 8 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Key Facts About Scatter Graphs
- Purpose: Show relationships between two variables
- Correlation: How closely two variables are related
- Positive correlation: As one increases, the other increases
- Negative correlation: As one increases, the other decreases
- No correlation: No clear relationship between variables
- Line of best fit: Shows the general trend in the data
- Outliers: Points that don't fit the general pattern
Practice questions for Scatter Graphs
A scatter graph shows that as temperature increases, ice cream sales also increase. This is an example of:
A scatter graph shows a strong positive correlation between the number of ice creams sold and the number of drowning incidents at a beach. A student says: 'Ice cream causes drowning.' Explain why this conclusion is incorrect.