Sam ate 70 grams of this cheese. About how many calories were there in the cheese he ate if the number of calories varies directly as the weight of the cheese? (There are about 90 calories in 20 grams of this cheese.)

Correct answer marked below

175

200

225

275

315

Correct

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Comments

MacroSep 19

thanks, this one was pretty straightforward once I set up the proportion.

MaxSep 27

yeah the 'varies directly' wording basically tells you what to do. easy points if you don't overthink it

SeyramAug 18

got 315, felt confident. these direct variation ones are a nice break from the harder ratio stuff

What this question tests

Your ability to convert between fractions, ratios, and decimals and to reason proportionally.

Cross-multiplying incorrectly or mixing up the ratio parts — a part:part ratio is not a fraction of the whole.