Aset of data points has a line of best fit if y= -0.2x + 1.7 what is the residual for the point 5,1

We know that
The residual value is the observed value minus the predicted value.
RESIDUAL VALUE=[OBSERVED VALUE-PREDICTED VALUE]
where
Predicted value.--> the predicted value given the current regression equation
Observed value. --> The observed value for the dependent variable.

in this problem
the point (5,1) means  that for x=5  the observed value is 1

predicted value  for x=5    y=-0.2x+1.7> y=-0.2*5+1.7> y=0.7
predicted value is 0.7
observed value is 1
so
RESIDUAL VALUE=[1-0.7]> 0.30

the answer is
the residual value is 0.3