The cards Question What is a rate of change? Tap to flip Answer How one variable changes with respect to another. Question If the rate of change between two variables is constant, what is their relationship? Tap to flip Answer Linear. Question Why can the line on a distance-time graph never be vertical? Tap to flip Answer That would mean a change in distance with no change in time. Question Why can the line on a distance-time graph not go backwards? Tap to flip Answer Because time is always moving forwards. Question What is displacement? Tap to flip Answer The distance from the starting point, measured in a straight line. Question Does a sketch graph need to be to scale? Tap to flip Answer No, but it must contain all the key information. Question On a distance-time graph, what does a horizontal line mean? Tap to flip Answer No distance was travelled during that time. Question On a distance-time graph, what does a slanted line mean? Tap to flip Answer The distance from the start is changing over time. Question What is the gradient of a line? Tap to flip Answer A measure of how steep it is: the rate of change in the y-direction with respect to the positive x-direction. Question What does the gradient of a distance-time graph give? Tap to flip Answer The speed. Question How do you get speed from distance and time? Tap to flip Answer Divide the distance travelled by the time taken. Question What do the units km/h tell you about how speed is calculated? Tap to flip Answer Distance in kilometres divided by time in hours. Question What is acceleration? Tap to flip Answer The rate of change of speed with respect to time. Question What is deceleration? Tap to flip Answer The rate at which an object's speed is decreasing. Question On a speed-time graph, what does a horizontal line mean? Tap to flip Answer The speed did not change during that time. Question Does a horizontal line on a speed-time graph mean the object is stationary? Tap to flip Answer No. The speed is unchanged, but it can be at any speed. Question On a speed-time graph, what does a slanted line mean? Tap to flip Answer The speed is changing. Question What does the gradient of a speed-time graph give? Tap to flip Answer The acceleration. Question On a speed-time graph, what does a negative gradient mean? Tap to flip Answer There is deceleration. Question Can more than one graph represent the same journey? Tap to flip Answer Yes, depending on the variables. Question On a time series graph, which axis always shows the time period? Tap to flip Answer The x-axis. Question How are the data points on a time series graph joined? Tap to flip Answer Chronologically, by line segments. Question What is extrapolation? Tap to flip Answer Estimating unknown values outside the range of the existing data. Question What is interpolation? Tap to flip Answer Estimating unknown values inside the range of the existing data. Question Why can interpolation be inaccurate? Tap to flip Answer For data collected at set points, there is no way to know what happens between the points. Question When filling a container, what affects how the volume of liquid changes over time? Tap to flip Answer The shape of the container. Question When is the relationship between two variables linear? Tap to flip Answer When plotting them on a pair of axes forms a straight line. Question Are linear graphs always the best representation of a real-life situation? Tap to flip Answer No. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Maths Unit Real-life graphs 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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