A quadratic function has its vertex at the point \( (-5,-4) \). The function passes through the point \( (8,-3) \). When written in vertex form, the function is \( f(x)=a(x-h)^{2}+k \), where: \( a= \) \( h= \) \( k= \)
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To find the vertex form of the quadratic function \( f(x) = a(x - h)^2 + k \), we start with the vertex \( (-5, -4) \), which gives \( h = -5 \) and \( k = -4 \). Thus, we can express the function as: \[ f(x) = a(x + 5)^2 - 4. \] Now, we need to find the value of \( a \) using the point \( (8, -3) \). Plugging in \( x = 8 \) and \( f(x) = -3 \): \[ -3 = a(8 + 5)^2 - 4. \] This simplifies to: \[ -3 = a(13)^2 - 4, \] \[ -3 = 169a - 4. \] Adding 4 to both sides gives: \[ 1 = 169a. \] Solving for \( a \) results in: \[ a = \frac{1}{169}. \] Combining everything, we find: - \( a = \frac{1}{169} \) - \( h = -5 \) - \( k = -4 \) So, the function in vertex form is \( f(x) = \frac{1}{169}(x + 5)^2 - 4 \).
