Answer:
Option C.
Step-by-step explanation:
The general form of exponential growth function is
[tex]f(x)=ab^x[/tex]
where, a is initial values and b is growth factor, b>1.
The given function are
[tex]f(x)=4(0.07)^x[/tex]
[tex]f(x)=2(0.44)^x[/tex]
[tex]f(x)=\frac{1}{2}(6)^x[/tex]
[tex]f(x)=7(\frac{1}{2})^x[/tex]
In functions 1,2, and 4 the values of b are 0.07, 0.44 and 1/2 respectively. The values of b are less than 1. It means they represent exponential decay.
In function 3, the values of b is 6, which is greater than 1. It means it represent exponential growth.
Therefore, the correct option is C.
