Question

Which function is exponential? y=5x^0.2 y=4(0.1)^x y=0.2x^3

I'm having troubles understanding exponentials, and I'm getting stumped a lot. How would you find which one is exponential? Thank you!

Answer 1

`y = 4(0.1)^x`

Explanation:

exponential functions are those where a number is raised to the power of a variable.

examples include `2^x`, and `3^(2x)`.

`y = 5x^(0.2)` and `y = 0.2x^3` have powers to fixed numbers.

meanwhile, `y = 4(0.1)^x` has a variable power, which changes as `x` does.

this means that `y = 4(0.1)^x` is the exponential function.