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Interpreting Graphs 1

AQA AS-level BiologyBiodiversityLesson 24 of 33

Graphs show the relationship between two variables. The independent variable is the one the investigator changes. It is plotted on the x-axis (horizontal).

The dependent variable is the one that is measured. It is plotted on the y-axis (vertical).

Each axis must have a label and units, for example "Temperature / °C". The scale should be even and use more than half of the grid.

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Key terms in this lesson

line of best fit
A straight or smooth curved line, drawn through or as close as possible to the plotted points on a graph, that shows the overall trend of the data.

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