Heather is attempting to find the x-coordinate of the vertex of the Quadratic Function, \( f(x)=-2 x^{2}+8 x-3 \) Which value or values of the function will Heather use the calculate? . 8 and -2 -2 only 8 only \( -2,8 \) and -3

To find the x-coordinate of the vertex of a quadratic function, Heather will use the formula \( x = -\frac{b}{2a} \). In this case, the coefficients are \( a = -2 \) and \( b = 8 \). This means she will actually focus on the values of -2 and 8 to calculate the vertex. To clarify, the vertex’s x-coordinate stems directly from "b" and "a." By plugging these values into the formula, she will neatly uncover the x-coordinate without needing the constant term (in this case, -3). Remember, the focus here is purely on the coefficients "a" and "b"!