Set 1: Quadratic Equations (Advanced)

**Choice C is the best answer.** In vertex form y = a(x - h) squared + k, the vertex is at (h, k). So x = 1

Explanation

Answer: C

PROBLEM

For the parabola y = 3(x - 1) squared + 9, what is the x-coordinate of the vertex?

✓ Correct

Detailed Explanation

Choice C is the best answer. In vertex form y = a(x - h) squared + k, the vertex is at (h, k). So x = 1

Why others are wrong:

A: 2 is incorrect because it does not satisfy the equation.

B: 3 is incorrect because it does not satisfy the equation.

D: 2 is incorrect because it does not satisfy the equation.