The correct option is C 120 and 180
By observing the table, we find the relation between the time and distance as,
distance = 30 × time
Hence, for 4 hours, distance covered = 30 × 4 = 120 miles
For 6 hours, distance covered = 30 × 6 = 180 miles
Hence, the missing values in the table are 120 and 180, for 4 hours and 6 hours, respectively.