Answer
See answers below
Work Step by Step
a) See the graph
b) The percent of students who ride the bus: $\frac{432}{432+135+252+81}=0.48=48\%$
c) The percent of students who walk: $\frac{252}{432+135+252+81}=0.28=28\%$
The percent of students who ride in a car: $\frac{81}{432+135+252+81}=0.09=9\%$
$\frac{28\%}{9\%} \approx 3$
There are 3 times more students who walk than ride in a car.
