# Write an exponential function to model the situation tax

Yes, provided the two points are either both above the x-axis or both below the x-axis and have different x-coordinates. In L2, enter the corresponding y-coordinates.

## Write an exponential function to model the situation then find the amount after the specified time

Figure 6 How To: Given two points on the curve of an exponential function, use a graphing calculator to find the equation. The graph is an example of an exponential decay function. We need to know the graph is based on a model that shows the same percent growth with each unit increase in x, which in many real world cases involves time. Notice how the value of the account increases as the compounding frequency increases. How to: Given the graph of an exponential function, write its equation First, identify two points on the graph. Not every graph that looks exponential really is exponential. Try It 5 Find an equation for the exponential function graphed in Figure 6. In L2, enter the corresponding y-coordinates. Solution Follow the guidelines above. Thus, the information given in the problem can be written as input-output pairs: 0, 80 and 6, Try to choose points that are as far apart as possible to reduce round-off error. But keep in mind that we also need to know that the graph is, in fact, an exponential function. In L1, enter the x-coordinates given.

Clear any existing entries in columns L1 or L2. The term nominal is used when the compounding occurs a number of times other than once per year. To the nearest thousandth, what will the population of India be in ? How to: Given two points on the curve of an exponential function, use a graphing calculator to find the equation Press [STAT]. In L2, enter the corresponding y-coordinates. Solution Find the Equation of an Exponential Function In the previous examples, we were given an exponential function, which we then evaluated for a given input. By the population had reached wolves.

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