CPM Homework Help : CCA Problem 4-100

A tile pattern has $10$ tiles in Figure 2 and increases by $2$ tiles for each figure. Find a rule for this pattern and then determine how many tiles are in Figure 100.

Step 1:

Work backwards from Figure 2 to find out the starting number of tiles.
Consider using a table, illustration, or graph to help you solve.

$y=mx+b$

$m=$ growth rate
$b=$ starting number of tiles

Step 2:

To find how many tiles are in figure 100, substitute $100$ for $x$ and solve for $y$ .

Answer:

$206$ tiles.