What is the equation of the inverse of the function?

f(x)=3x8+1
options:

f−1(x)=83x−13

f−1(x)=83x−83

f−1(x)=83x−1

f−1(x)=38x−1

Step-by-step explanation:

The question is asking for the equation of the inverse of the function. The full equation is:

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.