The equation of a line passing through two points A(x₁, y₁) and B(x₂, y₂) is given by:

1. (x – x₁) = $\dfrac{y$2 - y1}{x2 - x1} (y – y₁)

2. (y – y₁) = $\dfrac{x$2 - x1}{y2 - y1} (x – x₁)

3. (y – y₁) = $\dfrac{y$2 - y1}{x2 - x1} (x – x₁)

4. (y – y₁) = $\dfrac{y$1 - y2}{x2 - x1} (x – x₁)

The equation of a line with slope m and passing through (0, 0) is :

1. x = my

2. y = mx

3. m = y – x

4. m = y + x

The equation of a straight line whose inclination with x-axis is 30° and whose y-intercept is –4, is:

1. $\sqrt{3}x - y - 4\sqrt{3} = 0$

2. $x + \sqrt{3}y - 4\sqrt{3} = 0$

3. $x - \sqrt{3}y - 4\sqrt{3} = 0$

4. $\sqrt{3}x + y - 4\sqrt{3} = 0$

The slope of the straight line passing through the points A(3, –2) and B(3, –4) is:

1. 0

2. 1

3. –2

4. not defined