## When f ‘(x) is positive, f(x) is

### When the derivative of a function, f ‘(x), is positive, it indicates that the function f(x) is increasing

When the derivative of a function, f ‘(x), is positive, it indicates that the function f(x) is increasing. In other words, as x increases, the corresponding values of f(x) also increase.

To understand this concept, let’s consider an example. Suppose we have a function f(x) that represents the height of a balloon as a function of time. If f ‘(x) is positive, it means that the height of the balloon is increasing over time. As time passes, the balloon is getting higher and higher.

Graphically, if we plot the function f(x) on a coordinate plane, and f ‘(x) is positive, we will observe that the graph of f(x) slopes upwards from left to right. This positive slope indicates an upward trend, showing that the values of f(x) are increasing.

It’s important to note that when f ‘(x) is positive, it does not necessarily mean that f(x) is always increasing. There might be small intervals where the function decreases or remains constant, but overall, the function exhibits an increasing behavior.

Understanding the sign of the derivative, whether positive or negative, helps to analyze the behavior of functions and identify critical points, maximum and minimum points, and inflection points, among other properties.

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