Questions: Determine the quadratic function of the form f(x)=a(x-h)^2+k whose graph is given on the right. f(x)=
Transcript text: Determine the quadratic function of the form $f(x)=a(x-h)^{2}+k$ whose graph is given on the right.
\[
f(x)=
\]
Solution
Solution Steps
Step 1: Identify the Vertex
The vertex of the quadratic function is given as (2, -5).
Step 2: Substitute the Vertex into the Vertex Form
The vertex form of a quadratic function is \( f(x) = a(x - h)^2 + k \). Substituting \( h = 2 \) and \( k = -5 \), we get:
\[ f(x) = a(x - 2)^2 - 5 \]
Step 3: Use Another Point to Find 'a'
We use the point (1, 4) to find the value of 'a'. Substitute \( x = 1 \) and \( f(x) = 4 \) into the equation:
\[ 4 = a(1 - 2)^2 - 5 \]
\[ 4 = a(1)^2 - 5 \]
\[ 4 = a - 5 \]
\[ a = 9 \]
Final Answer
The quadratic function is:
\[ f(x) = 9(x - 2)^2 - 5 \]