Please explain this definition

Zeeshan 01 · 2016-12-22 19:22:43

A rule that assigns to each element x in X a unique element y in Y is Called a function from
X TO Y
what it saying what rule what x in X

zetafunc · 2016-12-24 04:46:08

A function is a rule.

Here, x is just a member of the set X. Here's a picture:

Zeeshan 01 · 2016-12-25 00:22:07

How function is rule

And what is d b c a in y

zetafunc · 2016-12-25 01:07:33

Suppose I want to define a function that takes any number and adds 3 to it. How would you define such a function?

Last edited by zetafunc (2016-12-25 01:07:44)

Zeeshan 01 · 2016-12-25 01:41:00

Oops I cannot define it

Zeeshan 01 · 2016-12-25 01:44:16

But what is x and y please show me process graphically...

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