So when an equation or set of equations are parallel, that means that the equations have the same slope.
for the given equation, it has a slope of 2.
so to find the equation of the other line, you substitute the coordinate and slope into the equation y=mx+b.
-2=2(3)+b
-2=6+b
-8=b
So your function that is parallel has a slope of 2 and a y intercept at -8 or (0,-8).
Then just substitute those values into the equation.
y=2x-8
