Question

Use the parabola tool to graph the quadratic function f(x)=−x^2+4.

Graph the parabola by first plotting its vertex and then plotting a second point on the parabola.

Answer 1

So to find the vertex, do
\(\large \frac{-b}{2a}\)

Answer 2

that is what i am trying to figure out though

Answer 3

What is confusing you