To find the equation of the line, I need to find the slope $m$ and the y-intercept $b$. The slope is the change in $y$ over the change in $x$, which I can calculate from the two given points. The change in $y$ is $2-0=2$, and the change in $x$ is $0-(-2)=2$, so the slope is $m=2/2=1$. The y-intercept is the value of $y$ when $x=0$, which is given by one of the points as $b=2$. Therefore, the equation of the line is $y=x+2$. To find the value of $m+b$, I just add the slope and the y-intercept: $m+b=1+2=3$. 
The equation of the line that passes through the points $(-2,0)$ and $(0,2)$ can be expressed in the form $y=mx+b$. What is the value of $m+b$?