How is $e^x$ read aloud?

My current research colleague from New Castle told me that I was reading it wrong. I usually read it as e power x.

How do you read aloud $e ^ x$?

Is it:

• e raised to x
• e power x
• e powered x
• or e raised to the power x.

What is the correct pronunciation?

I think "e to the x" or "the exponential of x" are both fine. I might even use "e of x."

When I read it out loud, I prefer saying e to the $\rm x$ because it is a quick phrase and means the same as e raised to the $x$th power. Albeit, it still differs from person-to-person.

I would usually say "e to the x", but when the interpretation is clear "e x" is sufficient to me.