## Introductory Algebra for College Students (7th Edition)

For 66-year-olds, the model overestimates the percentage by $0.2$ percent.
Substituting a with $66$ in the given formula, we find $p=52-0.3\cdot a$ $p=52-0.3\cdot 66$ $=52-19.8$ $=52.0-19.8$ $=32.2$ (percent) The graph gives $32=32.0$, so the model overestimates the value in the graph by $0.2$ (percent). $(32.2-32.0=0.2)$