Please hurry What does it mean to say that a data point has a residual of -1?

A. The point lies 1 unit above the regression line.
B. The point lies 1 unit below the regression line.
C. The point lies directly on the regression line.
D. The predicted value for that point is -1.

Please hurry

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?