1. It’s a parabola.

2. It’s based on the leading coefficient.

9. Plug in `x` ＝ 0, `x` ＝ 1, `x` ＝ 2, etc., and then reflect these points to make a parabola.

14. Use Desmos.

20. Is `a` positive or negative? Is |`a`| bigger than 1 or smaller than 1?

26. See #20.

33. Make sure to use parentheses around the negative number before squaring it.