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Which of the following equations correctly describes a line with a slope of $-\cfrac { 1 }{ 2 }$, which crosses the $x$-axis at $\left( \cfrac { 7 }{ 8 } , 0 \right)$?

(Calculator)

A

$y = -0.5x + 0.875$

B

$x - 2y = 0.25$

C

$x + 2y = -0.875$

D

$x + 2y = 0.875$

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