Which equation is represented by the graph?

According to the Graph:
When, Y= 0

Then, X= 2

(D) When Y= 0

0= 1/2x -1
X= 2

since, (0,2) lie on the Graph, Option (D) is correct.

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.