Question

Note: My school has a study guide, yet when referring to the text, it does not say anything about this...

The difference between a relation and a function is _______________?

Answer 1

I am in algebra by the way

Answer 2

http://wiki.answers.com/Q/When_can_you_say_that_a_relation_is_a_function

Answer 3

a function is a special type of relation..

Answer 4

Thanks, I didnt see that wiki answer.

Answer 5

what does your text say what is a function?

Answer 6

For as long as you have taken math courses, you have worked with equations similar to the ones shown below.

1 + 2=3
x + 7 = 10
4x + 7 = y
x2 – 7x + 6 = y

Most of the equations you have worked with up to this point have also been functions. But, what's the difference between an equation and a function?

Take a look at the linear equation y = 2x + 3. This is a linear equation because the degree of the equation is 1. The graph of this equation can be found by plotting the y-intercept at 3 and counting the slope 2 (rise over run). Or, you could choose x-coordinates to substitute into the original equation, and then find the corresponding y-coordinates. Let's take a look at this second method.

Answer 7

Notice that each member of the domain (x-coordinate) corresponds to a unique member of the range (y-coordinate). There isn't a single x-coordinate that is associated with two different y-coordinates. If you think of the x-coordinates as being the input values and the y-coordinates as the output values, you could say that every input has only one distinct output. This is the definition of a function.

Answer 8

that last post, second sentence... that's what a function is.

Answer 9

Thanks!

Answer 10

yw...