From data $(-4, 1)$, $(-1, 2)$, $(2, 7)$ and $(3, 1)$, the regression line of $y$ on $x$ is obtained as $y = a + bx$, then what is the value of $2a + 15b$?
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The data points are (-4, 1), (-1, 2), (2, 7), and (3, 1). Show more…
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