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 yvalue and the x is your xvalue.
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.