Note :

The gradient , m, of the line segment joining the two points $\"\"$ is

$\"\"$ .

The points are $\"\"$ .

a).

Gradient of the line segment [ AB ] = $\"\"$ .

Substitute the values of $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

Gradient of the line segment [ AB ] is 3.

b).

Point - slope form of the line equation is $\"\"$ .

Substitute the values of $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

The equation of the line is $\"\"$ .