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Teaching mathematics
Teaching mathematics

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3.2 Increasing and decreasing graphs

In the Video 2, the graph of time in minutes against time in hours was described as increasing, since whenever the x-variable increases, the y-variable does too.

It is also possible for graphs to be decreasing. The definition for a decreasing graph is: whenever the x-variable increases, the y-variable decreases.

Most graphs are neither increasing or decreasing.