For the motion of a falling object, which graphs are straight lines? * O
Acceleration versus time only
Displacement versus time only
Displacement versus time and acceleration versus time
O Velocity versus time and acceleration versus time

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).