Answer:
x=3
Step-by-step explanation:
-6x=-8x+6
+8 +8
2x=6
2/2 6/2
x=3
I believe your answer is going to be increasing linear. If it's doubling constantly then it's increasing so that takes out 2 options. And since it's constant, it isn't exponential, therefore you only have increasing linear left.
I hope I was able to help. Best of luck.