Hadley is studying the relationship between the arrival delay of a flight and the duration of the flight. Both the lengt

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Hadley is studying the relationship between the arrival delay of
a flight and the duration of the flight. Both the length of the
delay and the duration of the flight are measured in minutes. A
negative arrival delay would indicate that the flight
landed early.
Construct a scatterplot with the arrival delay as the
independent variable and air time (duration of the flight) as the
dependent variable. Add a least-squares regression line to the
plot. Decide whether an influential data point is present.
There (is) OR (is not) an influential data point
because
A. Removing the influential point significantly affects the
slope of the regression line
B. The slope of the regression line stays negative when the
influential data point is removed
C. Removing the influential point does not significantly affect
the slope of the regression line
D. The influential point appears to be significantly distant
from the rest of the data points