Given points are

Next, find the slope.

Substitute 8 for y₂,  1 for y₁, 3 for x₂, and 6 for x₁  in slope formula.

           (Subtract: )

                 (Subtract: )

                   (Cancel common signs)

                      (Cancel common terms)

You know the slope and a point on the line, so use point - slope form

with either given point to write an equation of line.

Choose

       (Substitute 1 for y₁, 6 for x₁ and )

    (Apply distributive property: )

            (Multiply: ) According to addition property of equality: a=b then a+c = b+c.

(Add 1 to each side)

      (Apply additive inverse property: )

            (Apply additive identity property: )

                      (Add: )

The equation of line is .