The graph shows the effect of the number of passengers
on the number of crashes per 10,000 trips.
about how many times more likely is a 17-year-old driver
to crash with three passengers than with one passenger?
o
o
crashes by number of
passengers and driver age
0 1 2 3+
about twice as likely
about three times as likely
about four times as likely
about five times as likely
o
crashes per 10,000 trips
drivers ages 16-17