The johnson family is taking a car trip. they are driving at an average speed of 60 miles per hour. the graph shows their distance traveled over time. how far will the johnson family travel in 3 1 2 hours?

Speed is given by the formula:
speed=distance/ time
this implies that when we rewrite the above formula for distance we shall have:
distance=speed*time
from our question:
speed=60 mph
time=3 1/2 hours=3.5 hours
thus
distance=60x3.5
=210 miles
the answer is 210 miles