CPM Homework Help : CCG Problem 1-80

Copy the table below, complete it, and write an equation relating $x$ and $y$ .

$\begin{array} { | c | c | c | c | c | c | c | } \hline \quad x \quad & \; { - 3 } \; & \; \ { - 2 } \; & \; { - 1 } \; & \;\; { 0 } \;\; & \;\; { 1 } \;\; & \;\; { 2 } \;\; & \;\; { 3 } \;\; & \;\; { 4 } \;\; \\ \hline y & { - 7 } & { } & { \ } & { 2 } & {5} & { } & { } & {14}\\ \hline \end{array}$

Hint:
Use the $y=mx+b$ format to write your rule.
More help:
Find $m$ (the slope) by finding the difference between the $y$ -values for two consecutive $x$ -values.
Substitute the values you found for $m$ and $b$ into the original equation.
Answer:
$y=3x+2$

Complete the table in the eTool below to help you solve this problem.
Click the link at right for the full version of the eTool: 1-80 HW eTool