Disposable income is the amount left after taxes have been paid and is one measure of health of the economy. The table gives the total disposable income for a​ country, in billions of​ dollars, for selected years from 2010 and projected to 2040. Year    Income 2010    10.558 2015    11.572 2020    12.353 2025    14.764 2030    15.388 2035    17.818 2040    19.183 b. Find a linear model that models the​ data, where x is the number of years after 2000 and y is the total disposable income in billions of dollars.

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