We can use the vertex form of a quadratic,

, to find that

. Plugging

ordered pairs into g(x), we see that a = 1. For example, for

,

. Solving for a gives 1.
Answer:
A= 13 B=13.1
Step-by-step explanation:
A-B= -0.1
B-A= 0.1
D
- Harvard university professor