81
9+9+9+9+9+9+9+9
9,18,27,36,45,54,63,72,81,90,99
................
what
Answer:
B
Step-by-step explanation:
It's not a function because the X's repeat
y-y1=m(x-x1)
y-2=1/3(x-3)
y=1/3x+1