An airline has 90% of its flights depart on schedule. it has 71% of its flights depart and arrive on schedule. find the probability that a flight that departs on schedule also arrives on schedule.

The following probabilities are given:

0.9 is the probability of the flight that departs on schedule.
0.71 is the probability of the flight that departs and arrive on schedule.

This problem is an example of a conditional probability, so we will use the quotient rule. To solve for the probability of the flight departs on schedule and also arrives on schedule is computed by:
 = .789 is the probability

Ibelieve the answer is b. y=0 would make the line horizontal across the x.