### Home > CAAC > Chapter 6 > Lesson 6.2.5 > Problem 6-85

6-85.

Make an *x*, *y* table with the *x* values representing the figure number and the *y* values representing the number of tiles.

Fill in values for *x* and *y*. What is the growth?

Work backward. What is the starting point?

Write an equation *y* = *mx* + *b* using the growth and starting point.

*y* = 3*x*

Does this rule work for your table?

Once you find a rule for the pattern use the eTool below to complete the figures.

Click the link at right for the full version of the eTool: AC 6-85 HW eTool.