Question

How do you graph `y=-x^2+4`?

Answer 1

graph{-x^2+4 [-10, 10, -5, 5]}

Explanation:

First graph `-x^2`
graph{-x^2 [-10, 10, -5, 5]}

that is just as `x^2` but with the vertical values inverted
and then move it 4 units up.