Put this In mathematics, a function is a relation between a set of inputs and a set of outputs, where each input is related to exactly one output. It can be seen as a rule or a mapping that assigns each input value to a unique output value.
Looking at the given table, it shows a function because each day of the week is represented in the first column (set of inputs), and each day has only one corresponding value in the second column (set of outputs) which represents the number of children in the car. This means that for each input (day of the week), there is a unique output (number of children), satisfying the definition of a function. into easy words
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In simpler terms, a function in math is like a rule that pairs up each input with a specific output. In the table example, it looks at the number of children in a car each day of the week. Each day has only one number of children connected to it, showing that it follows the rules of a function.