1. The problem statement, all variables and given/known data If the graphs of A1x + B1y = C1 and A2x + B2y = C2 are perpendicular, express the following in terms of A2 and B2. A1/B1= ? 2. Relevant equations Negative reciprocal 3. The attempt at a solution I thought that by expressing A2 and B2 with A1/B1, it would just be the negative reciprocal if its perpendicular so it would be -B2/A2 which is incorrect.