day 1: 312 miles
day 2: 490 miles
day 3: 221 miles
day 4: 270 miles
day 5: 503 miles
a group of girls are taking a road trip across the us. the distances they travel for each of the five days are shown.

which is a good estimate of the number of miles traveled over the five day period?
a) 1500 miles
b) 1600 miles
c) 1700 miles
d) 1800 miles