Question

Which of the following is an exponential decay function?
y=3^x
y=4x^3
y=3^(x-3)
y=(1/2)^x

Answer 1

one of these four.

Answer 2

Ha you're funny :P

Answer 3

LOL. srsly.. one of these four.

Answer 4

The first one?

Answer 5

no

Answer 6

for something to decay as the x value becomes bigger the y value becomes smaller

Answer 7

they are Inversly Prop.

Answer 8

exactly so if u look at the first 1
x=1 then y=3
x=2 then y=9
so its getting bigger.
also this is getting bigger exponentially or exponential growth

Answer 9

hmm.

Answer 10

exponential growth has the form
y=a^x
a is any constant.
since x is increasing u want a number that when it multiplies by itself u get a smaller number.
the only numbers that do that are decimals or fractions