The slope is the ratio of rise to the run of a graph. The slope of the plant growth to time graph given in the question is 0.5
Slope = Rise / Run
Slope = Rise / Run = 10/20 = 1/2 = 0.5
Hence, the slope of the graph is 0.5.
This means that the plant's height increases at a rate of 0.5 cm everyday .
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