Question

A data set consists of these points: (2, 4), (4,7), (5, 12). Malinda found theregression equation to be 9 = -2.5x - 1.5. Is she correct?OA. No. Both a and b are incorrect.OB. No. The value for bis incorrect.OC. No. The value for a is incorrect.OD. Yes. This is the correct equation.

Answer 1

`y=-2.5x-1.5`

Let us test each of the coordinates points

at ( 2, 4 )

at x=2

`\begin{gathered} y=-2.5(2)-1.5 \\ y=-6.5 \end{gathered}`

No agreement with the y-coordinate

Let us test the second coordinate point ( 4 , 7 )

at x = 4

`\begin{gathered} y=-2.5(4)-1.5 \\ y=-11.5 \end{gathered}`

No agreement with the y-coordinate

Let us test the third coordinate point (5, 12 )

at x= 5

`\begin{gathered} y=-2.5(5)-1.5 \\ y=-14 \end{gathered}`

No agrement with the y-coordinate

Based on the information you have provided in the question , y= - 2.5x - 1.5 is not a correct regression equation for the line .