Which equation has a graph perpendicular to the graph 7x=14y-8

Slope-intercept form is y = mx + b

m is the slope

b is the y-intercept

7x = 14y - 8

7x + 8 = 14y {added 8 to each side}

(1/2) x + (8/14) = y

slope is 1/2

A line perpendicular would have a slope of - 2 {the negative reciprocal of 1/2}

#1 y = - 2x - 7 {it is the only one with a slope of - 2}