NCERT Exercise 9.1 Q11 - Straight Lines
Question: Prove that the equation of the line through (x1, y1) with slope m can be written as k - y1 = m(h - x1), where (h, k) is any point on it.
Answer: k - y1 = m(h - x1).
Full step-by-step NCERT solution with diagrams on Something by Zero.