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R

root

any number x multiplied by itself a specific number of times to produce another number, such that in xn = y, x is the nth root of y – for example, because 23 = 8, 2 is the 3rd (or cube) root of 8

root of an equation

any number that makes the equation true when the variable is equal to that number. That is, a solution of the equation.

roots of a quadratic equation

the x-intercepts of the parabola or the solution of the equation

run

horizontal change between two points

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