When does the graph of a quadratic function open up?open down?

The graph of a quadratic function opens up when a (<,>,=) 0 and opens down when a (<,>,=) 0

1. >

2. <

Step-by-step explanation:

When a > 0, the graph opens upwards, or positively, because the way the line curves is determined by a.

When a < 0, the graph opens downwards, or negatively, for the same reason.