## Algebra 1: Common Core (15th Edition)

The missing value is: $0.9$ An equation is $y = 70x$.
The values of y seem to vary directly with the values of x. Ratio: $\frac{28}{0.4}=70$ $\frac{84}{1.2}=70$ The ratio $\frac{y}{x}$ is the same for all data pairs. So this is inverse variation, and $k =70$. The missing value is: $0.9$ since $\frac{63}{0.9}=70$ An equation is $y = 70x$.