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The inverse of a function can be found by switching the independent variable (typically the "x") and the dependent variable (typically the "y") and solving for the "new y". You can also create a t-chart for the original function, switch the x and the y, and graph the new relation.

You will note that a function and its inverse are symmetrical around the line "y = x".

Sometimes the inverse of a function is not actually a function; since it doesn't pass the "vertical line test"; in this case, you have to restrict the new function by "erasing" some of it to make it a function.

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Q: How do you find an inverse of a function?
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How do you use inverse log on graphing calculator?

The inverse of a logarithmic function is an exponential function. So to find the "inverse" of the log function, you use the universal power key, unless you're finding the inverse of a natural log, then you use the e^x key.


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The inverse of the function y = x is denoted as y = x. The inverse function essentially swaps the roles of x and y, so the inverse of y = x is x = y. In other words, the inverse function of y = x is the function x = y.


What is the relationships between inverse functions?

The inverse of the inverse is the original function, so that the product of the two functions is equivalent to the identity function on the appropriate domain. The domain of a function is the range of the inverse function. The range of a function is the domain of the inverse function.


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The original function's RANGE becomes the inverse function's domain.


What is the inverse function of -6?

-6 is a number, not a function and so there is not an inverse function.


What is the inverse of a cubic function?

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Check out the acos function.


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X squared is not an inverse function; it is a quadratic function.


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The inverse function means the opposite calculation. The inverse function of "add 6" would be "subtract 6".


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Does every function have an inverse that is a function?

No. A simple example of this is y = x2; the inverse is x = y2, which is not a function.