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| Representation of a Function |
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| A function can be represented by the following methods: |
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| R = {(1, 1), (2, 3), (4, 6)} |
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| {(1, 1), (2, 2). (3, 3), (4, 4)} |
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| f : {(x, y) : y = 4x + 5} |
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| where x belongs to real numbers. |
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| (iv) A table. The following table represents first to fifth rank holders of a class. |
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| (vi) An algebraic formula. We can use an algebraic formula to represent a function {(x, y) : f(x) = x2 + 3,
x Î I} |
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| Domain is the set of integers and range is {3, 4, 7, 12, 19, 28, 39, 52, …} |
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| (i) {(x, y) : f(x) = x2 + 3, x
Î I} can also be expressed as |
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(ii) f(x) = x2 + 3,  |
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(iii) f(x) = x2 + 3 and f :  |
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| (iv) f : x→
x2 + 3 where x Î I, |
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(v) y = x2 + 3 and  |
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