Find the equation of the straight line

(a) With gradient 3/2 passing through the point (2, 1);

(b) With gradient –2 passing through the point (–2, 3);

(c) Passing through the points (1, 2) and (3, 7);

(d) Passing through the points (5, 0) and (0, 3);

(e) Parallel to the line 3y – x = 5, passing through (1, 1);

(f) Perpendicular to the line 3y – x = 5, passing through (1, 1).