3.1

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.