Graphs make it easy to identify trends in data that you have collected and can be analysed in order to perform a calculation.ĭrawing a graph and using the gradient of the line of best fit is a technique that reduces the effect of both systematic and random errors and makes the experiment both more accurate and more reliable. Plot the data and draw a line of best fit.Ī graph is a visual representation of a relationship between two variables: the independent and the dependent variable. ![]() They must be controlled or kept constant during the experiment so that only one variable is changed at a time.ģ. ![]()
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