The population (in millions) of the United States between 1970 and 2010 can be modeled as p(x) = 203.12e0.011x million people where x is the number of decades after 1970. The percentage of people in the United States who live in the Midwest between 1970 and 2010 can be modeled as m(x) = 0.002x2 − 0.213x + 27.84 percent where x is the number of decades since 1970.† How rapidly was the population of the Midwest changing in 1990 and in 2010? (Round your answers to three decimal places.) 1990       million people per decade 2010       million people per decade

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.