The answer is the second option.
The general equation for distance is:
D=rt
Where d=distance, r=rate, and t=time.
You can solve this equation for t by dividing by r.
t=d/r
Which is the form of the equation they gave you. They said y is the amount of time it takes, and x is the rate. This means that 60 has to be the distance that must be traveled to get to michael's grandparents house :)
The answer is B :)