SOLUTION: why is 𝑦-𝑦 sub 0 =m(m-𝑥 sub 0) used instead of 𝑦-𝑦 sub 1 =m(𝑥-𝑥 sub 1) in point slope formula

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Question 1154382: why is
𝑦-𝑦 sub 0 =m(m-𝑥 sub 0) used instead of
𝑦-𝑦 sub 1 =m(𝑥-𝑥 sub 1)
in point slope formula
Answer by ikleyn(52884) About Me  (Show Source):
You can put this solution on YOUR website!
.

First form is INCORRECT 
    because its right side is incorrect --- due to presence of "m" inside the parentheses.

The second form is correct.

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Answered, explained, and completed.