Question

Help !!! Which functions in the table below give values that could come from exponential functions? Check all that apply.

x -3 -2 -1 0 1 2 3
f(x) 0.6678... 1.1019... 1.8181... 3 4.95 8.1675 13.476375
g(x) 0.125 0.25 0.5 1 2 4 8
h(x) 0.25 0.5 0.75 1 1.25 1.5 1.75
k(x) 64 16 4 0 0.25 0.0625 0.0156

A. g(x)
B. h(x)
C. f(x)
D. k(x)

Answer 1

exponential means that the difference between the numbers is not the same each time.
the difference between them must be getting greater or smaller, but cannot remain the same or oscillate

Answer 2

once again robz im lost dude

Answer 3

okay think about these as if they are graphs.

do you know what a quadratic function looks like?
quadratic functions are functions whose highest power is 2. these are exponential functions

Answer 4

ok yeah

Answer 5

so look at f(x). is the difference in numbers changing for each iteration?

Answer 6

then take a look at h(x), is the difference between the numbers changing for that one? if not, than the equation is not exponential

Answer 7

no

Answer 8

im thinking c

Answer 9

for f(x), the difference in numbers IS changing

Answer 10

then i would choose a and d

Answer 11

that means f(x) IS a exponential function

when i say "the difference in numbers" i mean:

1.1019 - 0.6678 ==
1.8181 - 1.1018 ==
3 - 1.8181 ==

the answer is A, C, and D.

h(x) is the only non exponential function since the difference between the numbers is always 0.25

Answer 12

thanks once again man

Answer 13

yw