Answer:
Point-slope is the general form y-y₁=m(x-x₁) for linear equations. It emphasizes the slope of the line and a point on the line (that is not the y-intercept). Watch this video to learn more about it and see some examples. Created by Sal Khan.
Step-by-step explanation:
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The initial expression is:
So we can solve for r so:
Hello, hope this makes some sense, the midpoint formula is what’s given in the picture and the rest is just substitution
