CPM Homework Help : GB8I Problem 2-86

Does the table below appear to represent a function? If so, write an equation using function notation. If not, explain why it cannot represent a function.

Figure # $\bf(\boldsymbol x)$	$0$	$1$	$2$	$3$	$4$
# of tiles $\bf(\boldsymbol y)$	$4$	$8$	$12$	$16$	$20$

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 the right to view full version of the eTool: 2-86 HW eTool