(Ay)? у - (тх+ с) (= Ay) y xy тх + с 1 1 2 2 4 3 5 4 Ex = |Ex² = Σxy- E(Ay) = |E(Ay)? = 1. Firstly, annotate the axes and plot the data points to check whether it is reasonable to fit a straight line to the data points (but do not draw a line through then yet).

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