CPM Homework Help : CCA Problem 2-31

Does the table below appear to represent a function? If so, write an equation using function notation that represents the table. If not, explain why it cannot represent a function. 2-31 HW eTool.

Figure #
$x$

figure # x, column, 1 $0$

figure # x, column, 2 $1$

figure # x, column, 3 $2$

figure # x, column, 4 $3$

figure # x, column, 5 $4$

# of tiles
$y$

# of tiles y, column 1 4

# of tiles y, column 2 $8$

# of tiles y, column 3 $12$

# of tiles y, column 4 $16$

# of tiles y, column 5 $20$

Hint:

There can only be one $y$ -value for each $x$ -value in a function.

More Help:

Plot the points on a graph and draw a slope triangle or use another method to find the slope.
The $y$ -intercept is given in the chart when $x=0$ .

Answer:

$f(x)=4x+4$

Input the points into the table in the eTool below to determine if it represents a function.
Click the link at right for the full version of the eTool: CCA 2-31 HW eTool