A brand new smartphone costs $1200. It decreases in value by 13.3% every year after its purchase. Which function models the value of the phone x years after its purchase? Question 8 options:

f(x)=1.133(1200)x

f(x)=1200(1.133)x

f(x)=1200(0.867)x

f(x)=0.867(1200)x