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Direct Proportional Relation - Yes or No?

Do the following examples represent a direct proportional relation? Read the sentences and decide if it is a direct proportional relation or not!

The more fitness devices a family owns, the higher is the fitness level of the family.

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The more Harry Potter books you buy, the more you have to pay in total. Assumption: Every Harry Potter book costs the same.

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The more workers are helping to harvest the cherrys, the longer the harvest takes. Assumption: All workers work with the same speed.

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The older I get, the more I weigh.

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The more expensive the joghurt is, the better it tastes.

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The more people are visiting me, the more seats I need around the dinner table. Assumption: Every person needs an own seat.

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The longer the sides of a square are, the greater is the area.

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Did you answer all questions? Press Check to see if your answers are right. You can repeat the task and make new crosses. Now think of other examples, write them in your book and justify if it is a direct proportional relation or not.