Given:
The equation of the regression line to be
y = 2.4x + 3.1
where x represents the number of people ahead of you in minutes
and y represents the predicted time
If there are 5 people ahead, this means that
x = 5
Then we can substitute x = 5 into the equation
y = 2.4 x 5 + 3.1
y = 12 + 3.1
y = 15.1
Therefore, the predicted time will be 15.1 minutes