Question 475472
Skip the " = 0" part, since the graph would be two points instead of a parabola.


The function f(x) = -0.2x + x^2 + 0.2 goes to positive infinity on both sides, so the parabola opens down. The x^2 coefficient determines this because it has the highest degree.


 (I actually never learned a parabola "opening up" or "opening down" in school, it is a vague definition and hardly anyone uses that definition in higher-level mathematics.)