Linear with three ways

3. Five 2 cm thick experimental pieces of an insulation material were tested at random. Resulted compression (y) was measured recorded for the given amount of measured pressure. The data are listed below: Pressure Compression -3 -1 -1 0 1.5 2 3 3 4 5 4 Find the followings: a) Fit a simple linear model relating compression y to the applied pressure x using graphs and calculations. b) For the pressure-compression model, estimate the relation between x and y, estimate the error variance. c) A measure of the strength of the linear rela onship between x, and y in the sample. Y