Question 166343
Remember, perpendicular lines have slopes that are inverse reciprocals of one another. So in this case, the slope of the given line is {{{m=1/4}}}. Flip the fraction and change the sign to get {{{-4/1}}} or just {{{-4}}}. So the slope of a line perpendicular to the given line {{{y=(1/4)x-5}}} is {{{m=-4}}}