GCSE Maths Practice: graphs-of-quadratic-functions

Question 6 of 10

Find the vertex of a quadratic function.

\( \text{Find the vertex of the quadratic function } y = -3x^2 + 18x - 15. \)

Choose one option:

Compute axis of symmetry, then calculate the y-coordinate.

Use \(x = -b/(2a)\) for the x-coordinate and substitute back to get y.