Evaluate: y=-(2)/(3)x

Expression: $y=-\frac{ 2 }{ 3 }x$

Adding $0$ doesn't change the value, so add it to the expression

$y=-\frac{ 2 }{ 3 }x+0$

Since the equation is written in slope-intercept form, $y=mx+b$, identify the slope of the line as the coefficient next to the variable $x$

$\begin{array} { l }y=-\frac{ 2 }{ 3 }x+0,& m=-\frac{ 2 }{ 3 }\end{array}$

Identify the $y$-intercept of the line as the constant term

$\begin{array} { l }y=-\frac{ 2 }{ 3 }x+0,& m=-\frac{ 2 }{ 3 },& b=0\end{array}$

The slope of the line is $m=-\frac{ 2 }{ 3 }$ and the $y$-intercept is $b=0$

$\begin{array} { l }m=-\frac{ 2 }{ 3 },& b=0\end{array}$