Figure 3 of a tile pattern has 11 tiles, while Figure 4 has 13 tiles. The pattern grows at a constant rate.  

1. Write an equation to represent this situation.

   Hint (a):

   Make a table for the pattern. Use the table to write your equation.

   $\begin{array}{|l|c|c|c|c|c|c|} \hline \text{Figure #} \qquad & \quad 0 \quad & \quad 1 \quad & \quad 2 \quad & \quad 3 \quad & \quad 4 \quad & \quad \;\; \quad \\ \hline \text{Tiles} & & & & 11 & 13 \\ \hline \end{array}$

   How much does the number of tiles increase as the figure number increases?

   Answer (a):

   $y=2x+5$

2. Which figure will contain $1015$ tiles?

   Hint (b):

   Let $y=1015$ in the equation. Then solve for $x$.