What is the equation of the function shown in the graph, given that the equation of the parent function is f(x)=(1/7)^x ?

a. g(x)=(1/7)^x−3

b. g(x)=(1/7)^x−2

c. g(x)=(1/7)^x−4

d. g(x)=(1/7)^x+3

I just took the test, the correct answer is .. g(x) = (1/7)^x - 4.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional