The equation y = 9.56x + 495.35 represents the number of calories, y, consumed in one day based on a person’s weight, x. Jill consumes 1850 calories daily. Jaxon weighs 120 pounds. Which is an accurate comparison?

Use the equation to find Jill’s weight: set y = 1850 and solve x = (1850 − 495.35) ÷ 9.56 ≈ 141.7 pounds. Compared with Jaxon’s 120 pounds, Jill weighs about 21.7 pounds more, which is about 20 pounds. Therefore, Jill weighs about 20 pounds more than Jaxon.

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