\r\n A function (also called a mapping) is a mathematical rule that relates every element in one set to\r\n exactly one elment in another set.
\r\n The first set of numbers is called the domain of the function while the other set of numbers is called the range of the function.\r\n
\r\n For example, the relation described by \\( y = 2x+3\\) is a function because for every value of \\(x\\), there is exactly one value of \\(y\\).\r\n
\r\n The mathematical notation for a function is \\(y = f(x)\\), and is read as — \\(y\\) is equal to \\(f\\) of\r\n \\(x\\).
The letter \\(f\\) stands for the function, \\(x\\) stands for the input variable and \\(y\\) stands for the output variable.\n
\n In this MagicGraph, you are given two sets of numbers: x and y. Your goal is\r\n to select the function from the graph that represents the mapping from x to y.\r\n
\r\n To select a function, tap on it. Once selected, then tap on the test button to check your answer.\r\n
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\r\n You can tap on icon to shuffle numbers.\r\n You can tap on the icon to check your answer.\r\n
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