[ y = 2x plus or minus any number ] is parallel to it.
[ y = -0.5x plus or minus any number ] is perpendicular to it.
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If you mean: y = 2x-4 and (1, 5) then the parallel equation is y = 2x+3
5
I assume the question should be y = -2x + 5? The equation of a line that is parallel to that line is any line that begins 7 = -2x ... after the -2x any number may be added or subtracted. Parallel lines have the same slope. In the original equation, the slope is -2.
y -4 = 3(x-3)y = 3x -5
The slope, or the change in y in respect to x, can be found by putting the equation into y = mx + b form. Y = (9/5) x - 4/5 The slope is m or (9/5). Any equation in y intercept form with that slope is parallel.