The input-output digram repents f(x)=x+2 what is the missing output value

6 → 6 + 2 = 8

7 → 7 + 2 = 9

8 → 8 + 2 = 10

9 → 9 + 2 = 11

5 → 5 + 2 = 7 → B

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.