Question

a data set consists of these points (2, -4), (4, -7), (5, -12), Elisa found the regression equation to be y = 2.5x + 1.5 is she correct

Answer 1

Not correct.

Explanation:

If we plug in the x values into the equation we don't get anyway near to the y-values:

x = 2, y = 2.5(2) + 1.5 = 6.5 - comp[are this with y = -4 of the point(2, -4).

when x = 4, y = 11.5 ( compared with -7) and

when x = 5, y = 14 (compared with -12).