Answer:
C. I wear my raincoat if and only if it's raining
Go on this web operation calcularter
Answer:
B)
and C) 
Step-by-step explanation:
Once a linear function has a constant rate of change, you just have to find the linear functions. Also, the other ones are quadratic functions, and their graph are parabolas, which don't have a constant rate of change.
Considering 
has a constant positive rate of slope 2.

has a constant negative rate of slope -7

Answer:
3n/8 ≤ 13
Step-by-step explanation: