### Home > GB8I > Chapter 6 Unit 7 > Lesson INT1: 6.4.2 > Problem6-141

6-141.

Multiple Choice: Which equation below could represent a tile pattern that grows by adding three tiles and has nine tiles in Figure $2$?

1. $3x + y = 3$

1. $-3x+y=9$

1. $-3x+y=3$

1. $2x + 3y = 9$

Growth is the rate of change or the slope, in slope intercept form ($y = mx + b$) what variable represents the growth?

Knowing figure $2$ has nine tiles, how can you use the growth to find the number of tiles in figure number $0$ (starting figure)?

Write the equation in slope intercept form, then rearrange to Standard form ($Ax + By = C$).

(c)