Scattergraphs (OCR GCSE Maths): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the main reason we use scatter graphs?
What is the main reason we use scatter graphs?
To determine if variables are related
What does each point on a scatter graph represent?
What does each point on a scatter graph represent?
A pair of values for two variables
What is positive correlation?
What is positive correlation?
As one variable increases, the other increases
What is negative correlation?
What is negative correlation?
As one variable increases, the other decreases
How should the scale on a scatter graph increase?
How should the scale on a scatter graph increase?
In equal steps
How should negative numbers behave on a scale?
How should negative numbers behave on a scale?
Decrease in value moving left or down
What should you use to mark each data point on a scatter graph?
What should you use to mark each data point on a scatter graph?
A small dot or cross
What does the line of best fit show?
What does the line of best fit show?
The general trend in the data
Must the line of best fit start at the origin?
Must the line of best fit start at the origin?
No, unless the data suggests it
What indicates a strong correlation?
What indicates a strong correlation?
Points closely clustered around the line
In positive correlation, which direction does the line of best fit slope?
In positive correlation, which direction does the line of best fit slope?
Upwards
What can the line of best fit be used for?
What can the line of best fit be used for?
Predicting values not in original data