exponential functions

Question

y=3 x 2^x

Answer 1

y = 3(2^x), assuming that first "x" is meant to mean multiplication and not the same variable as the exponent.

y/3 = 2^x

take logs of both sides, with log to the base 2

log₂(y/3) = x

x = log₂(y/3)

graphically, the y intercept is 3, when x=0

y = 3(2^0) = 3(1) = 3

the y intercept is 3 which is the point (0,3)

horizontal asymptote is the x axis or y=0

OR maybe you really meant y=3x(2^x) then

it gets more complicated, so odds are you didn't mean that