There are about 200 calories in 50 grams of Cheddar cheese. Tena ate 70 grams of this cheese. About how many calories were in the cheese that she ate if the number of calories varies directly as the weight of the cheese

Because calories vary directly with weight, first find the calories per gram: 200 ÷ 50 = 4 calories per gram. For 70 grams, 70 × 4 = 280 calories, so the correct choice is 280 calories.

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