Exponential Function

The exponential function is one of the most important functions in mathematics. The application of this function to a value x is written as exp(x). Equivalently, this can be written in the form ex, where e is a mathematical constant, the base of the natural logarithm, which equals approximately 2.718281828, and is also known as Euler's number.
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Noun
1. a function in which an independent variable appears as an exponent
(synonym) exponential
(hypernym) function, mathematical function

This fits to the data, an exponential function of the form:
y = b*exp(q*x)

exponential function
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