$\"\"$

The points are $\"\"$ .

The slope of the line passing through the points $\"\"$ is $\"\"$ .

$\"\"$ (Slope formula)

$\"\"$ (Substitute: $\"\"$ ) $\"\"$

$\"\"$ (Subtract: $\"\"$ )

So, the slope is $\"\"$ . $\"\"$

The slope of the line passing through the points P and Q is $\"\"$ . \ \