Chapter 8 Rational Functions - 8.1 Model Inverse and Joint Variation - 8.1 Exercises - Problem Solving - Page 556: 38

$R=\dfrac{8951.25}{I}$ and $R \approx 263$

General equation for inverse variation is given by $y=\dfrac{k}{x}$ Here, we have $I=\dfrac{k}{R}$ and $R=\dfrac{k}{I}$ This gives: $k=I R$ and $K \approx \dfrac{8880+8900+9075+8950}{4} =8951.25$ Thus, our formula is: $R=\dfrac{8951.25}{I}$ Set $I=34$ $I=\dfrac{8951.25}{34} \approx 263$ ohms