Which of the following is the identity function?

$y = 1$

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$y = x^{2}$

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$y = | x |$

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$y = x$

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Solution

The correct option is D
$y = x$

Identity function is the name of the function $f (x) = x$

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Similar questions

What are the common factors of $3 x^{3} y, 5 x y^{2} a n d 15 x y ?$

x^{2} y > 0

x + y = 0

x y < 0

\frac{1}{x} - \frac{1}{y} = 0

x + y + x y = 11, x^{2} y + x y^{2} = 30

| x | < 1, | y | < 1

x \neq y,

(x + y) + (x^{2} + x y + y^{2}) + (x^{3} + x^{2} y + x y^{2} + y^{3}) + . . . . . . \infty

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