Question

6. The vertex of a parabola is (15,-30) and the y-intercept is (0,25). Is this enough information to write

the equation? If so, do such, if not explain.

Answer 1

`y=(11)/(45) x^2-(22)/(3)x+25.`

Explanation:

Enough.

The explanation is in the attached picture.

Note, the suggested way is not the only one, and finally a=11/45.