Precalculus Examples

Find the Start Point Given Mid (0,9) and End (8,6)
,
The midpoint formula is .
Set the equal to the coordinate.
Solve for to get .
Substitute the values for and in .
Simplify the right side of .
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Simplify each term.
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Multiply by .
Multiply by .
Subtract from .
Set the equal to the coordinate.
Solve for .
Substitute the values for and in .
Simplify the right side of .
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Simplify each term.
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Multiply by .
Multiply by .
Subtract from .
The start point is .
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