Find the exponential function f(x)=ax whose graph goes through the point (3,125). a= .?

NetherCraft 0

a=?

1 Answer

  • In an exponential function, the variable “x” is your exponent. What you are actually asking, then, is this:

    f(x) = a^x

    You can substitute your given values now. f(x) is the same thing as your y-value and the x is your x-value.

    Now you have this:

    125 = a^3

    Ok…. What number, raised to the third power, equals 125? Your answer is 5.

    125 = 5^3.

    So your a = 5.

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