Thế population of a certain country was approximately 25 million in 1900, 175 million in 1950, and 275 million in 2000. Construct a model for this data by finding a quadratic equation whose graph passes through the points (0,25), (50,175), and (100,275). Use this model to estimate the population in 2050. Let x be the number of years since 1900 and y be the population in millions. y = (Use integers or decimals for any numbers in the expression.)

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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.