Algebra: Exponent and logarithm as functions of power

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Exponents and logarithms with fixed base and variable power play a surprisingly large role in real life. For example, there is a particular base e such that the slope of the exponent e%5Ex is that exponent itself!
Properties of exponents a%5Ex: Domain: all numbers. Range: positive numbers. If a (the base) > 1, exponent is an increasing function, it is less than 1 for all negative x, and above 1 for all positive x. If a < 1, it is a decreasing function, greater than one for x < 0, and less than 1 for x > 0.
Properties of logarithms log%28+a%2C+x+%29: Domain: all non-negative numbers. Range: all numbers. log%28+a%2C+1+%29+=+0 for all a. For a > 1: logarithm is an increasing function. log%28+a%2C+x+%29+%3C+0 when x < 1, log%28+a%2C+x+%29+%3E+0 when x > 1. For a < 1: logarithm is a decreasing function log%28+a%2C+x+%29+%3E+0 when x < 1, log%28+a%2C+x+%29+%3C+0 when x > 1.
graph++%28+200%2C+200%2C+-5%2C+5%2C+-10%2C+10%2C+2.718%5Ex+%29+

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