Question

Which of the following functions decreases, going downwards from left to right on a graph?
A. y = 4x
B. y = 5x
C. y = (1/2)^x
D. y = 3(2)^x

Answer 1

@ninjawolfjj

Answer 2

I feel like you are missing a negative sign...

Answer 3

Well...

Answer 4

hmm let me check

Answer 5

no not missing anything:)

Answer 6

ok

Answer 7

would my answer be C?

Answer 8

I believe it is probably C.

Answer 9

C is correct. Since you are raising a fraction between 0 and 1 to a power, the higher the power, the smaller the number will be. For example:
For x = 1, 2, 3
(1/2)^1 = 1/2
(1/2)^2 = 1/4
(1/2)^3 = 1/8
As you can see, as x increased, from 1 to 2 to 3, f(x) decreased from 1/2 to 1/4 to 1/8