Exercise 8.1.1: Variation Functions and Applications For problems 1-4, assume y varies directly with Find the constant of proportionality and a representative function for each problem: ! = 2.8 when z = 2 2 4 = 2 when " 3. J = 0.6 when ? = 0.4 4 =5 when z = 0.5
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Since y varies directly with z, we can write the relationship as y = kz, where k is the constant of proportionality. We are given that y = 2.8 when z = 2. Plug these values into the equation to find k: 2.8 = k(2) Divide both sides by 2: k = 1.4 So the constant Show more…
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