There is a standard equation for a straight line. It is y = mx + b.
m is the slope and b is the y-intercept (when x = 0).
In the question m = -4 and is therefore the slope of the line represented by the equation y = -4x + 7.
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Slope = 4
== == y = -x + 5
4x-y+3 = 0 -y = -4x-3 y = 4x+3 Therefore: the slope is 4 and the y intercept is 3
4x+2y = 6 2y = -4x+6 y = -2x+3 Perpendicular slope is 1/2
-3