CPM Homework Help : INT1 Problem 2-74

Each part below represents a different situation. For each situation, determine the pattern of growth and the number of tiles in Figure 0 or the $y$ -intercept.

	tile	tile
	tile	tile
tile	tile	tile	tile	tile
	tile	tile
	tile	tile
Figure 2

	tile	tile
	tile	tile
	tile	tile
tile	tile	tile	tile	tile	tile
	tile	tile
	tile	tile
	tile	tile
Figure 3

	tile	tile
	tile	tile
	tile	tile
	tile	tile
tile	tile	tile	tile	tile	tile	tile
	tile	tile
	tile	tile
	tile	tile
	tile	tile
Figure 4

Hint (a):

How many more squares does Figure 3 have than Figure 2?

Hint (b):
Make a slope triangle between two points on the graph to find the slope, or the growth rate.
Answer (b):
Growth rate: $−2$

$y=3x−14$
Answer (c):
$G = 3, y-int = –14$

$\boldsymbol x$	$-3$	$-2$	$-1$	$0$	$1$	$2$	$3$
$\boldsymbol y$	$18$	$13$	$8$	$3$	$-2$	$-7$	$-12$

Hint (d):

What is the difference between each $y$ -value?
What is the value of $y$ when $x$ is $0$ ?

Which situation above is growing (increasing) at the fastest rate?