Answer:
The correct option is 1.
Step-by-step explanation:
The formula for residual value is
[tex]\text{Residual Value = Observed Value - Estimated value}[/tex]
In the given graph points represents the observed value and the line represents the expected or estimated value.
From the given graph it is clear that the observed value at x=5 is 5.5 and the estimated value at x=5 is 7.
[tex]\text{Residual Value}=5.5-7[/tex]
[tex]\text{Residual Value}=-1.5[/tex]
The residual value is -1.5, therefore the correct option is 1.
