Rates – A comparison of two products to see which is cheapest

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Direct Variation – both methods

Given y is directly proportional to x and y46 when x62, find y when x17.


Proportions – Solving for the variable

Student solution for solving for x in a proportion by cross-multiplication.


Proportional Reasoning

Proportional Reasoning


Solving for x in a proportion

Solving for x in a proportion


Indirect Variation – both methods

Given y is indirectly proportional to x and y95 when x54, find y when x17.