Question

What is the equation in point-slope form of the line passing through (1, 9) and (-1, 11)?

Answer 1

m = (y2-y1)/(x2-x1)


m = (11-9)/(-1-1)


m = (2)/(-2)


m = -1

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y - y1 = m(x - x1)


y - 1 = -1(x - 9)


y - 1 = -(x - 9)

Answer 2

You can do further simplification, but then it wouldn't be in point-slope form any more