Aline of best fit predicts that when x equals 35, y will equal 34.785, but actually equals 37. what is the residual in this case?

We know that

Residual Value = Observed Value– Predicted Value

in this problem
Observed Value=37
Predicted Value=34.785
Residual Value = 37-34.785> 2.215
positive values for the residual (on the y-axis) mean that the prediction was too low

the answer is
2.215

With a continuous thought process.