Answer:
The correct option is A.
Explanation:
The difference between actual value and predicted value is called residual.
Formula of residual is
![e=y-\hat{y}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/1h9jemfohmmj95bah0dttaww3zz7xows06.png)
Where, y is observed value or actual value and
is predicted value.
![e=3-1.6](https://img.qammunity.org/2019/formulas/mathematics/middle-school/6k69ammi0h24c8cg3rgijekfa2lg3cgwa7.png)
![e=1.4](https://img.qammunity.org/2019/formulas/mathematics/middle-school/fpqw07by70zg3o6b2502ezfts93n1w9hmp.png)
The value of residual is 1.4 and option A is correct.