Total distance walked = 1500 meters.
Dakota's r ate is 60 meters per minute.
The equation for distance walked over time = r ⋅ t .
Therefore the distance walked over t ime = 60 ⋅ t
The equation for distance remaining (let's call it R is 1500 − ( 60 ⋅ t ).
so the remaining distance to walk after a time t can be written as
R = 1500 − ( 60 ⋅ t )