Which of the following equations has a vertex of (3, -3) ?
A. y = 5(x - 3)2 - 3
B. y = 5(x + 3)2 - 3
C. y = 5(x - 3)2 + 3
D. y = 5(x + 3)2 + 3
Answer:A
Which of the following equations has a vertex of (3, -3) ?
A. y = 5(x - 3)2 - 3 B. y = 5(x + 3)2 - 3 C. y = 5(x - 3)2 + 3 D. y = 5(x + 3)2 + 3
Explanation: A The vertex form of a parabola is y = a(x - h)2 + k, where (h, k) denotes the vertex. Plug in the point (3, -3) into the vertex form to get y = a(x - 3)2 - 3. The correct answer is (A).