The slope of a vertical line is:

1. 0

2. 1

3. 90

4. not defined

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

1. $m = \dfrac{x$2 - x1}{y2 - y1}

2. $m = \dfrac{y$2 \times y1}{x2 \times x1}

3. $m = \dfrac{x$2 \times x1}{y2 \times y1}

4. $m = \dfrac{y$2 - y1}{x2 - x1}

Which of the following lines does not have x-intercept?

1. A horizontal line

2. A vertical line

3. An oblique line

4. None of these

Which of the following lines does not have y-intercept?

1. A horizontal line

2. A vertical line

3. y-axis

4. A transverse line