Which of the following are exponential functions?
Select all the correct options.
$y=x^5$y=x5
$y=2x+5$y=2x+5
$y=2^x$y=2x
$y=x^e$y=xe
$y=\left(\frac{3}{4}\right)^x$y=(34)x
$y=e^x$y=ex
Consider the equation $y=3^x$y=3x.
Consider the function $y=3^x$y=3x.
Consider the function $y=3^{-x}$y=3−x.