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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)

$ y = -0.5x + 0.875 $

$ x - 2y = 0.25 $

$ x + 2y = -0.875 $

$ x + 2y = 0.875 $