Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §4.1 The Chain Rule, #59 · Calculus · Differentiation rules

Coke costs 1/3 dollar per bottle

Coke costs 1/3 dollar per bottle. The buyer gets ____ bottles per dollar. If $d y / d x = 1/3$ then $d x / d y =$ ____ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §4.1 The Chain Rule, #59

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