### Home > CCG > Chapter 1 > Lesson 1.2.3 > Problem1-80

1-80.

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

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

• Use the $y=mx+b$ format to write your rule.

• 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.

• $y=3x+2$

• 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: CCG 1-80 HW eTool (Desmos)