Precalculus Examples

, ,
Slope is equal to the change in over the change in .
Substitute in the values of the known parameters.
Rewrite the equation as .
Simplify the numerator.
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Multiply by to get .
Add and to get .
Simplify the denominator.
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Remove parentheses.
Multiply by to get .
Add and to get .
Divide by to get .
Since , the equation will always be true.
Always true
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