Chapter 9 - Section 9.4 - Variation and Problem Solving - Exercise Set - Page 662: 19

The constant of variation is $0.14$. The inverse variation equation is $y=\frac{0.14}{x}$.

$y=\frac{k}{x}$ $y=0.2; x=0.7$ $0.2=\frac{k}{(0.7)}$ $0.2\times0.7=k$ $0.14=k$ The constant of variation is $0.14$. The inverse variation equation is $y=\frac{0.14}{x}$.