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.