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: )
(Add 1 to each side)
(Apply additive inverse property: )
(Apply additive identity property: )
(Add: )
The equation of line is .
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