Question

which pair of lines are perpendicular lines? A. y= 4x -6 y= 4x + 11 B. y= -4x -6 y= 4x + 11 C. y=1/4 x -6 y= 4x + 11 D. y= -1/4x - 6 y= 4x + 11

Answer 1

using the formula of a line y = mx + b, with m being the slope of a line, the slope of its perpendicular line would be the negative reciprocal of m, that is -1/m. therefore the answer is D, as the negative reciprocal of -1/4 is 4