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Recap: Variation

Part of the Polynomials & Rational Expressions section of Coddy's Algebra 2 journey. Lesson 46 of 51.

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Challenge

y varies directly with x, and y is 18 when x is 3. Find y when x is 8. On the blank board, find k first, then y.

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All lessons in Polynomials & Rational Expressions

1Polynomial Long Division

How Long Division WorksThe Remainder TheoremA Missing TermRecap: Long Division

4Polynomial Equations

Common Factor FirstGrouping to SolveFourth PowersRecap: Polynomial Equations

7Adding and Subtracting

Same BottomDifferent BottomsSubtractingFactor the Bottoms FirstRecap: Adding Fractions

10Variation

Direct VariationInverse VariationWork TogetherRecap: Variation

2Remainders and Factors

The Factor TheoremFinding a Missing NumberUsing a Known FactorRecap: Remainders and Factors

5Sign Charts

Between the RootsOutside the RootsA Negative Leading TermReading a Sign ChartRecap: Sign Charts

8Rational Equations

Clearing Fractionsx in the BottomCross-MultiplyingA False AnswerOne True, One FalseRecap: Rational Equations

11Final Challenges

Final: Divide It OutFinal: Every RootFinal: One FractionFinal: Check the AnswerFinal: The Sign Chart

3Factoring Higher Degree

Factor by GroupingGrouping All the WayDifference of CubesSum of CubesA Quadratic in DisguiseRecap: Factoring

6Rational Expressions

Cancelling FactorsExcluded ValuesMultiplyingDividingRecap: Rational Expressions

9Rational Inequalities

Signs of a FractionIncluding the EdgeRecap: Rational Inequalities