Question

Which quadratic equation fits the data in the table? (PICTURE OF TABLE ATTACHED)

A) y = x² + 7x + 1

B) y=−x2+7x+1

C) y=x2−7x−1

D) y=x2−7x+1

Answer 1

The correct quadratic equation for that set of points is:

`y=x^2+7x+1`

To check it, simply put first and last pair of points and assure the equality:

`-11=(-3)^2+7*(-3)+1`

`-11=9-21+1`

`-11=-11`


`79=6^2+7*6+1`

`79=36+42+1`

`79=79`