What is an equation of the line that passes through the point ( − 2 , − 6 ) and is parallel to the line x + 2 y = 8 x+2y=8?

B.) I believe is the correct answer.
 A closed circle on a graph means that that value is included, meaning a less than and equal to sign or a greater than or equal to sign. 
An open circle on a graph means that the value is not include, meaning a greater than or less than sign. 

Hope this helps!