[Video] Q31: The scatterplot shows the percent of flights with delayed departures and the percent of flights with delayed arrivals, by departing airport, for 10 us airports in a certain one-year period. a line of best fit is also shown. for how many of the 10 airports was the percent of flights with delayed arrivals less than predicted by the line of best fit?

Explanation for Question 31 From the Math (Calc) Section on the 2020 October Sat

So question number 31 gives us a scatterplot. 2 And then it asks us the question for how many of the 10 airports 3 was the percent of flights with delayed arrivals, 4 less than that predicted by the line of best fit. 5 And so we know that the line of best fit goes right here. 6 And so all we have to do is count the number of data points 7 that fall below the line of best fit that happens at 1, 2, 3, 4, 5, 6 8 data points. So our answer is going to be six.