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Function here I’m going to define function, examples and mathematics insight Definitions function, in mathematics, an expression, rule, or law, that defines a relationship between one variable (the independent variable/input) and another variable (the dependent variable/output). Generally it is denoted by, f(x) , g(x) ,and h(x). y=f(x) If a variable y depends on a variable x in such a way that each value of x determine exactly one of y , then we say that y is a function of x A function f is a rule that associates a unique output with each input. If the input is denoted by x , then the output denoted by f(x) (read as “ f of x” ) Examples let A be the area and r be the radius of the circle, A =4 pi r^2 where, A is dependent variable while r is independent variable let x is input a number of the real set and y is output also be the real set, X=X^3 ...