The Range value means the difference between the lowest and the highest value in the diagram. But domain means the set on an input or argument values for which the function is defined. The domain and range of a function is all the possible values of the independent variable such as x, the rang of a function is all the possible values of the dependent variable AKA the Y. you can write domain and range in two ways, they are called the interval notation and the set notation.
domain and range
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