On my parabola my equation of symmetry is x=-3. The x intercept is -3 and y intercept is 9. The parabola opens upward. What is the coordinates of the vertex

Answer 1

In a parabola, if the line of symmetry is x=-3 and the x-intercept is also x=-3, the parabola's vertex will be on the x-axis with coordinates (-3,0) regardless weather the the parabola opens upward or downward.