Final answer:
For a positive 'a', the graph opens upward, while for a negative 'a', it opens downward. The larger the absolute value of 'a', the steeper the graph; the smaller the absolute value, the flatter the graph.
correct answer is C.
Step-by-step explanation:
If a>0, then the graph opens upward. If a<0, then the graph opens downward.
The graph gets steeper as |a| gets larger. The graph gets flatter as |a| gets smaller.
Therefore, the correct answer is C. Upward, Downward, Steeper, Flatter.