Domain includes all real numbers without division by zero or negative roots. Domain can be written using interval notation with brackets or parentheses. Domain and range are written from smaller to larger values
Functions are machines that produce outputs based on input values. Descartes introduced function concept in 1637, Leibniz coined term "function". Functions model real-life phenomena like circle circumference and shadow length
A function assigns one element to each element in a set. Functions can be represented as ordered pairs (x, y). Vertical Line Test determines if a graph is a function
Domain is set of x-values that function produces y-values. Range is set of possible y-values. Domain notation uses brackets for included points, parentheses for excluded
A function relates inputs to outputs using sets. Domain is the set of values that go into a function. Range is the set of values that actually come out. Codomain is the set of possible outputs
Domain is the set of all possible x-values for which a function works. Range is the set of all possible y-values for which a function works. Function is defined from set A to set B if every A element has one B image