Scattergraphs (OCR GCSE Maths): Flashcards
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Practise the cards
14 cards from this deck
Purpose of scatter graphs
Purpose of scatter graphs
Determine if two variables are related and to what extent
What each point on scatter graph represents
What each point on scatter graph represents
A pair of values for the two variables
Definition of positive correlation
Definition of positive correlation
As one variable increases, the other also increases
Definition of negative correlation
Definition of negative correlation
As one variable increases, the other decreases
Definition of no correlation
Definition of no correlation
No clear relationship between the two variables
Scale requirement for axes
Scale requirement for axes
Equal steps, evenly spaced, no gaps or uneven intervals
How to mark data points
How to mark data points
Small dot or cross
Purpose of line of best fit
Purpose of line of best fit
Shows the general trend in the data
Balance for line of best fit
Balance for line of best fit
Roughly equal number of points above and below the line
Strong correlation characteristic
Strong correlation characteristic
Points closely clustered around the line
Weak correlation characteristic
Weak correlation characteristic
Points more spread out
Slope direction in positive correlation
Slope direction in positive correlation
Upwards
Slope direction in negative correlation
Slope direction in negative correlation
Downwards
Use of line of best fit
Use of line of best fit
Predict values not in the original data set