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