Linear regression

1. [20 points]I linear regression. Consider the following model. {a} [10 points) In a linear regression problem, you have trained a system to approximate a mapping from scaler :L' to sealer y as '3} = 2.: + 1 What is the residual sum of squares (RES) over the following given test set? Show your work. (b) [10 points) You want to use a linear model to predict a vector y : [yl , yg) from a. vector x = (551,32). Please derive the least square solution, where RSS 2 2:1 llyt- 51H