Nearly half of the U.S. population lives in coastal areas susceptible to coastal hazards, and the number of persons per square mile in these areas is increasing! How much? The number C of persons per square nile living in coastal areas can by approximated by C = 2.5N + 175, where N is the number of years after 1960. 350 + 300 250 200 150 100 50 - 1960 1970 1980 1990 2000 2010 2015 Year Noncogetal Coortol Persons per square mile

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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.