The equations of two perpendicular lines in the xy-plane are y = (a/b)x + c and y = (d/e)x + f, where a, b, c, d, e, and f are constants. If a/b > 1, which of the following must be true?
Q1. The equations of two perpendicular lines in the xy-plane are y = (a/b)x + c and y = (d/e)x + f, where a, b, c, d, e, and f are constants. If a/b > 1, which of the following must be true?
Answer: #NAME?
Explanation: Perpendicular lines have slopes whose product is −1; if a/b > 1, then d/e = −b/a, which lies strictly between −1 and 0.