as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
find the equation of the ray passing through (1, 3) and perpendicular to the line y = 4x + 9.
user
the equation of the ray passing through (–1, 3) and perpendicular to the line y = 4x + 9 is y = -4x + 7.
assistant