The slope of the line passing through the points (3, -2) and (-7, -2) is

1. 0

2. 1

3. -$\dfrac{1}{10}$

4. not defined

Slope of the line passing through (x₁, y₁) and (x₂, y₂) is given by,

$= \dfrac{y$2 - y1}{x2 - x1} \\[1em] = \dfrac{-2 - (-2)}{-7 - 3} \\[1em] = \dfrac{-2 + 2}{-10} \\[1em] = -\dfrac{0}{10} \\[1em] = 0.

Hence, Option 1 is the correct option.