Uncover the Vertex: Parabola Described by y=(x+8)²-9

Question

Find the vertex of the parabola

y=(x+8)29 y=(x+8)^2-9

Video Solution

Solution Steps

00:00 Find the vertex of the parabola
00:03 We'll use the formula to describe the parabola function
00:09 The coordinates of the vertex are (P,K)
00:20 We'll use this formula and find the vertex point
00:29 We notice that according to the formula P is negative
00:36 We'll substitute appropriate values according to the given data
00:41 And this is the solution to the question

Step-by-Step Solution

To solve for the vertex of the parabola, we need to recognize that the equation y=(x+8)29 y = (x+8)^2 - 9 is already in vertex form, which is y=(xh)2+k y = (x-h)^2 + k .

Let's break down the given equation:

  • Rewrite the given equation: y=(x+8)29 y = (x+8)^2 - 9 .
    This matches the vertex form y=(xh)2+k y = (x - h)^2 + k .
  • Identify values: Here, h=8 h = -8 and k=9 k = -9 .

Thus, the vertex is located at the point (8,9)(-8, -9).

Comparing with the multiple-choice options provided:

  • Choice 1: (8,9)(-8, 9) - Incorrect k k.
  • Choice 2: (8,9)(8, -9) - Incorrect h h.
  • Choice 3: (8,9)(8, 9) - Incorrect both h h and k k.
  • Choice 4: (8,9)(-8, -9) - Correct.

Therefore, the vertex of the parabola is (8,9)(-8, -9).

Answer

(8,9) (-8,-9)