What does it mean to say that a data point has a residual of -1?
•a) the point lies directly on the regression line
•b)the point lies 1 unit above the regression line
•c) the predicted value for that point is -1
•d)the point lies 1 unit below the regression line

Choice D is correct

Step-by-step explanation:

A residual is simply the difference between the actual data point and the point on the fitted regression line; Actual data point - fitted regression point = residual. From this equation, for the residual to be negative then the point must be less than that on the regression line and thus lie below it.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles