Determining Slopes of Parallel and Perpendicular Lines
Consider the graph of the line y = x-4 and the point
(-4, 2).
The slope of a line parallel to the given line is
A point on the line parallel to the given line, passing
through (-4, 2), is
The slope of a line perpendicular to the given line is
A point on the line perpendicular to the given line,
passing through (-4, 2), is

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14