If the instantaneous rate of change of f(x) with respect to x is positive when x=1, how can we tell if f is increasing or decreasing at that point?

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- May 30th 2009, 11:19 AMJiyongieInstantaneous Rate of Change
If the instantaneous rate of change of f(x) with respect to x is positive when x=1, how can we tell if f is increasing or decreasing at that point?

- May 30th 2009, 12:11 PMIsosceles Kramer
Just look at the wording. The RATE OF CHANGE is positive, which tells us what about the function. Well if it's changing positively then it must be increasing.