Given points are .

First, find the slope.

Substitute 5 for y₂,  7 for y₁, 3 for x₂, and  0 for x₁  in slope formula.

                       (Subtract: )

                          (Subtract: )

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 7 for y₁, 0 for x₁ and )

                (Apply additive identity property: )

                   (Multiply: )

Apply addition property of equality: If a = b then a + c = b + c.

        (Add 7 to each side)

             (Apply additive inverse property: )

                   (Apply additive identity property: )

The equation of line is .