What exponential function represents the data in the table?

x f(x)
3 64
4 256
5 1024

f(x) = x^4
f(x) = 4x
f(x) = x^4 – 17
f(x) = 4x + 17

Question

What exponential function represents the data in the table?

x	f(x)
3	64
4	256
5	1024


 	
	f(x) = x^4
	f(x) = 4x
	f(x) = x^4 – 17
	f(x) = 4x + 17

vera_ewing · Answer

I got	f(x) = -x^4 + 17 but that's not one of the answer choices :(

vera_ewing · Answer

....no?

dmndlife24 · Answer

I would just plug in the x for each answer choice and see if it gets its f(x)

dmndlife24 · Answer

For example, f(x) = x^4

Plug in 4 for x...

f(x) = 256

vera_ewing · Answer

So the answer is A?

dmndlife24 · Answer

i think so

zehanz · Answer

Because 64=4x4x4, 256=4x4x4x4 and 1024=4x4x4x4x4, the function should be f(x)=4^x, but this is not one of your options.

vera_ewing · Answer

@nincompoop Is it A? Can you just make sure please?

dmndlife24 · Answer

@ZeHanz thats what i was thinking

nincompoop · Answer

use QUALIFIED HELPER

zehanz · Answer

Maybe there's a "^"-character missing in answer b?

zehanz · Answer

Well, we KNOW the right answer f(x)=4^x, so imo you can move on to the next problem. No need to waste time on typesetting errors

zehanz · Answer

It's not one of your options, because all of them are wrong! Someone just made a typing error...