We plot the cups of coffee drink on the X-axis, whereas hours of sleep are plotted on the Y-axis.
plotting graphs relationship between various sets of variables with respect to one another. the main use of a graph is it helps us to present data which are complex to describe in the text.Since in the problem it is given that, the student wants to record the hours of sleep which are affected by the number of cups of coffee consumed by her or him, therefore we will plot the number of cups of coffee on the X-axis and the number of hours of sleep will be plotted in Y-axis .
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