The cards Question What is bivariate data? Tap to flip Answer Data with two variables, where each data point for one variable has a matching data point for the other Question What kind of data does a scatter graph represent? Tap to flip Answer Bivariate data Question What can a scatter graph be useful for? Tap to flip Answer Determining the nature of the relationship between two variables Question What is an independent (explanatory) variable? Tap to flip Answer A measure that is predicted to have an effect on another variable Question What is a dependent (response) variable? Tap to flip Answer A measure whose value is predicted to be affected by an explanatory variable Question On a scatter graph, which axis is the independent variable placed on? Tap to flip Answer The horizontal axis Question If the independent variable is placed on the other axis of a scatter graph, does the type of correlation change? Tap to flip Answer No: the points are reflected in y = x but the correlation type stays the same Question If unsure which variable is independent, how can you decide which to plot on the horizontal axis? Tap to flip Answer Consider which variable seems most likely to be affecting the other in context Question What does correlation describe? Tap to flip Answer The extent to which a relationship is close to a linear relationship Question Does correlation mean causation? Tap to flip Answer No Question How can two variables be correlated without one causing the other? Tap to flip Answer They may both depend on a third variable Question How should the type of correlation be interpreted? Tap to flip Answer In context Question What is a line of best fit? Tap to flip Answer A line where the distance between each data point and the line is minimised Question When can you draw a line of best fit? Tap to flip Answer When a linear trend can be identified Question What should a line of best fit represent? Tap to flip Answer The trend of the data Question Which variable should a line of best fit only be used to estimate? Tap to flip Answer The dependent variable Question Does a line of best fit always start at the origin? Tap to flip Answer No: it could, but it does not always Question What is interpolation? Tap to flip Answer Estimating unknown values inside the range of existing data Question What is extrapolation? Tap to flip Answer Estimating unknown values outside the range of existing data Question Why may extrapolation not be valid? Tap to flip Answer It is outside the observed data values (e.g. a linear trend might not continue indefinitely) Question Why may interpolation not be valid? Tap to flip Answer Because of the limitations of sampling or of the data set Question What is an outlier? Tap to flip Answer A data point that is extremely large or small compared with the rest of the data set Question Where does an outlier lie on a graph? Tap to flip Answer Far away from where most of the results are clustered Question Do outliers only occur at the start or end of a data set? Tap to flip Answer No Question When should an outlier be removed from a data set? Tap to flip Answer Only if it was recorded in error Question In bivariate data, how can a point be an outlier without being at the start or end of the data? Tap to flip Answer One of its variables is extremely smaller or greater than for other points with a similar value of the other variable Question What does a time series graph show? Tap to flip Answer Data over a time period Question On a time series graph, which axis always shows the time period? Tap to flip Answer The x-axis Question How are the points on a time series graph joined? Tap to flip Answer In time order, by straight line segments Question What does a time series graph plot against time? Tap to flip Answer Frequency Question Do time series graphs always use years as the time interval? Tap to flip Answer No: the interval depends on what the graph is intended to show Question What can a time series graph be used to estimate? Tap to flip Answer A frequency at a given time Question What can time series graphs help us spot? Tap to flip Answer Underlying trends or systematic patterns Question Are predictions from extrapolating a time series graph guaranteed? Tap to flip Answer No: they only indicate possible future results, and context (such as a natural limit) should be considered Question What do errors in drawing a scatter graph or time series graph produce? Tap to flip Answer Incorrect conclusions Question What may an outlier just be? Tap to flip Answer An unusual result Question Must a plausible claim be true because it is presented with data? Tap to flip Answer No: graphs can be misinterpreted, leading to invalid conclusions Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Maths Unit Graphical representations of data: scatter graphs and time series Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Maths lesson by Oak National Academy licensed under Open Government Licence (OGL)
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