CPM Homework Help : GB8I Problem 5-125

Figure $2$ of a tile pattern is shown at right. If the pattern grows linearly and if Figure $5$ has $15$ tiles, then find a rule for the pattern.

Tile 1	Tile 2	Tile 3	Tile 4
blank	Tile 5	Tile 6	blank

Figure 2

Hint:

Make a table relating the figure number to the number of tiles, or write a proportion.

Answer:

$y=3x$