Write the equation of the line that is parallel to line A and passes through Point P

Line A=

Point P= (-1,2)

your solution, y = 2x - 4 is incorrect ... the slope of your solution is 2, the slope of line A is -1 ... parallel lines have the same slope.

the line parallel to line A has slope m = -1 and passes through the point (-1,2).

link to using the point-slope form ... equations lines point slope