Which of the following equations represents a line passing through origin ?

1. 3x - 2y + 5 = 0

2. 2x - 3y = 0

3. x = 5

4. y = -6

Points A(x, y), B(3, -2) and C(4, -5) are collinear. The value of y in terms of x is ∶

1. 3x - 11

2. 11 - 3x

3. 3x - 7

4. 7 - 3x