It's a geometric sequence.

It's the sum for term 4 through term 15.
Answer:
y=2/1x +5
Step-by-step explanation:
m represents the slope of the line on the graph, m would be 2/1.
b represents the point on the y axis the line interects at, b would be 5.
Alll are integers since they are defined exactly.
Answer: A. You got it! ✔
Step-by-step explanation: All of the others use the "Y" Axis. That's big no-no for this question. Enjoy :)