CPM Homework Help : CCA Problem 6-66

Figure $3$ of a tile pattern is shown at right. If the pattern grows linearly and if Figure $7$ has $13$ tiles, then find an equation for the pattern.

tile $\space$		tile $\space$
	tile $\space$
tile $\space$		tile $\space$

Figure $3$

Hint:

Use the information to write points, for example (7, 13). Use the points to write the equation.

Answer:

y = 2x − 1