$\"\"$

Observe the graph, the two points are $\"\"$ .

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

$\"\"$ .

We can use either given point.

Substitute the values of $\"\"$ in the point - slope form of the equation $\"\"$ .

Substitute the values of $\"\"$ in the point - slope form of the equation $\"\"$ . $\"\"$

The point - slope form of the equation is either $\"\"$ or $\"\"$ .