\indexentry{proportional|hyperpage}{2}
\indexentry{proportionality constant|hyperpage}{2}
\indexentry{function|hyperpage}{4}
\indexentry{linear function|hyperpage}{4}
\indexentry{probably|hyperpage}{5}
\indexentry{linear function|hyperpage}{5}
\indexentry{slope|hyperpage}{5}
\indexentry{intercept|hyperpage}{5}
\indexentry{probably|hyperpage}{5}
\indexentry{chart type|hyperpage}{8}
\indexentry{scatter   chart|hyperpage}{8}
\indexentry{line chart|hyperpage}{8}
\indexentry{guess-and-check|hyperpage}{11}
\indexentry{probably|hyperpage}{12}
\indexentry{solar energy|hyperpage}{12}
\indexentry{probably|hyperpage}{13}
\indexentry{marathon|hyperpage}{13}
\indexentry{therm|hyperpage}{13}
\indexentry{British Thermal Units|hyperpage}{13}
\indexentry{Btu|hyperpage}{13}
\indexentry{calorie|hyperpage}{13}
\indexentry{progressive   tax|hyperpage}{14}
\indexentry{graduated tax|hyperpage}{14}
\indexentry{tax bracket|hyperpage}{14}
\indexentry{piecewise linear|hyperpage}{15}
\indexentry{effective tax rate|hyperpage}{15}
\indexentry{FICA|hyperindexformat{\ see {Social Security}}}{16}
\indexentry{Social Security|hyperpage}{16}
\indexentry{Medicare|hyperpage}{16}
\indexentry{regressive tax|hyperpage}{17}
\indexentry{probably|hyperpage}{19}
\indexentry{Edison, Thomas Alva|hyperpage}{20}
\indexentry{Perseid meteor shower|hyperpage}{22}
\indexentry{Perseid meteor shower|hyperpage}{22}
\indexentry{Jollity Building|hyperpage}{23}
\indexentry{Newton Conservators|hyperpage}{23}
\indexentry{probability|hyperpage}{23}
\indexentry{telephone bill|hyperpage}{25}
\indexentry{prepaid phones|hyperpage}{26}
\indexentry{iPhone|hyperpage}{26}
\indexentry{hybrid|hyperpage}{27}
\indexentry{iPhone|hyperpage}{29}
\indexentry{regenerative braking|hyperpage}{31}
\indexentry{Prius|hyperpage}{31}
\indexentry{pasta|hyperpage}{32}
\indexentry{solar energy|hyperpage}{34}
\indexentry{Wellesley College|hyperpage}{34}
\indexentry{wind power|hyperpage}{35}
\indexentry{solar power|hyperpage}{36}
\indexentry{MIT|hyperpage}{38}
\indexentry{Obama, Barack|hyperpage}{39}
\indexentry{effective tax rate|hyperpage}{41}
\indexentry{inflation|hyperpage}{42}
\indexentry{Pandora|hyperpage}{43}
\indexentry{Pandora|hyperpage}{43}
\indexentry{Times Square|hyperpage}{43}
\indexentry{stack exchange|hyperpage}{44}
\indexentry{tidal power|hyperpage}{50}
\indexentry{compact fluorescent bulb|hyperpage}{51}
\indexentry{MacKay, David|hyperpage}{55}
\indexentry{Rosenfeld, Robert|hyperpage}{57}
\indexentry{xkcd|hyperpage}{58}
\indexentry{solar power|hyperpage}{58}
\indexentry{bitcoin|hyperpage}{58}
\indexentry{fair|hyperpage}{58}
\indexentry{Zuckerberg, Mark|hyperpage}{58}
\indexentry{parking ticket|hyperpage}{58}
\indexentry{fog|hyperpage}{59}