6 + 2.8x$.
For each x value, we have:
$\hat{y}_1 = 0.6 + 2.8(2) = 6.2$
$\hat{y}_2 = 0.6 + 2.8(3) = 9.0$
$\hat{y}_3 = 0.6 + 2.8(4) = 11.8$
$\hat{y}_4 = 0.6 + 2.8(5) = 14.6$
Now, we can compute SSE, SST, and SSR.
SSE = $\sum(y_i - \hat{y}_i)^2$
SSE = $(6-6.2)^2 +
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