7rp2c Worksheets

Ratios and Proportional Relationships Analyze proportional relationships and use them to solve real-world and mathematical problems. 2Recognize and represent proportional relationships between quantities. cRepresent proportional relationships by equations. For example, if total cost t is proportional to the number n of items purchased at a constant price p, the relationship between the total cost and the number of items can be expressed as t = pn.

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Expressing Equations

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Turn a proportional relationship into an equation using a variable.
Identify the constant of proportionality (unit rate) and use it as the number that multiplies the variable.
Translate a word statement about “times as much” or “per” into an equation with an equals sign.
Match a situation to the correct equation form (like y = kx) and label what the variables represent.

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