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10 March, 06:35

Which pair of equations represents parallel lines A. y=2x+7 y=2x-7 B. y=2x-7 y=-1/2-7 C. y=2x+7 y=x+7

D. y=7 X=7

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  1. 10 March, 06:54
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    y = 2x + 7 and y = 2x - 7 → A

    Note that parallel lines have equal slopes

    the equation of a line in ' slope - intercept form ' is

    y = mx + c → (m is the slope and c the y-intercept)

    y = 2x + 7 has m = 2 and y = 2x - 7 has m = 2

    The only pair of lines with equal slopes is A
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