If u can understand this is the question : mark cycled 25 miles at a rate of 10 miles per hour. how long did it take mark to cycle 25 miles?

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

its a straight line parallel to the time axis