D is the answer to this question
Integers are closed under subtraction.
A and b I believe I think it is
Answer:
3a^2+12a-7
Step-by-step explanation:
Answer:

Step-by-step explanation:
using the y=mx+b equation, where m=slope and b=y-intercept, we can place our known slope and y-intercept to form our answer,
:-) hope this helped!