Problem 1. Find the equation of the line passing through the point (1, 1) and perpendicular to the line 2x+3y = 5.
Problem 2. Find the equation of the line passing through the point (2, 3) and perpendicular to the line y = −2x + 3.
Problem 3. Find the equation of the line passing through the point (3, 4) and perpendicular to the line 7x−2y = 1.
Problem 4. Find the equation of the line passing through the points (2, 1) and (−1, 3).
