Given:
The regression equation is:

The given point is (17,3.8).
To find:
The residual for the given point.
Solution:
We have,

Substituting
, we get



The predicted value at
is 11.
The given point is (17,3.8). It means the observed value at
is 3.8.
Formula for residual:
Residual = Observed value - Predicted value
Residual =

Residual =

Therefore, the residual for the given point is -7.2.