decide whether 3x-6y=12 and y=x+4/2 are parallel lines

Question

 decide whether 3x-6y=12 and y=x+4/2 are parallel lines

Answer 1

Examine their slopes.  If they are the same, the lines are parallel.  If they are different, the lines are not parallel.  Do you remember how to find the slope of a line, given its equation? You also might need parentheses around x+4 in the second equation.