Two lines are perpendicular, and neither line is horizontal . which of the following is not necessarily true of the lines a) the slope of the two lines are opposite reciprocals b) one line must have a positive slope c) the y-intercepts are the same d) one line must have a negative slope

I believe that the correct answer is C, although I’m not entirely 100% sure.

Answer choices A, B, and D all reflect necessities of the slopes of perpendicular lines. These choices also correlate with eachother, as opposite reciprocal slopes would result in one positive and one negative sloped lone. However, in contrast, answer choice C states that perpendicular lines would have the same y-intercept, which unless I am incorrectly visualizing isn’t possible. If the two lines were point opposite directions to make a right angle, they couldn’t hit the y-axis in the same place.

I hope this is accurate and helpful! :)

Choice C is correct
C) the y-intercepts are the same