Multiple Choice: Which equation below could represent a tile pattern that grows by $3$ and has $9$ tiles in Figure 2?  

• Hint:

  Work backwards from Figure 2 to find the starting value of tiles at Figure 0, then write the rule
  and match your answer.

  More Help:

  Rewrite the given equations in $y=mx+b$ form.

  Answer:

  (c) $-3x+y=3$