Basic mathbut I don't understand it?

basilmarket.com forums : Chat | 15 posts archived

thread starter Incedio654 Sep 01 2009 + PM | QUOTE | PERMALINK | REPORT

Describe what it means to be a "function." Give equations of two non-functions and explain why these two examples are not functions. Help?

ibenji 09/01/09 + PM | QUOTE | PERMALINK | REPORT

Ok so math is 1+1 thats about all you need to know.

Nonexistent 09/01/09 + PM | QUOTE | PERMALINK | REPORT

Function is where you have an equation where all y values have differnt x values. Certain x values, however, may have the same Y value. Function : X^2 Not a function. : X^(1/2) and -[X^(1/2)]

Incedio654 09/01/09 + PM | QUOTE | PERMALINK | REPORT

Nonexistent : Function is where you have an equation where all y values have differnt x values. Certain x values, however, may have the same Y value. Function : X^2 Not a function. : X^(1/2) and -[X^(1/2)] Why aren't those functions?

HolyMythos 09/01/09 + PM | QUOTE | PERMALINK | REPORT

If one value of X has more than one value of Y, then it is not a function. So, a graph of "~" would be a function, since every X value has only one Y value. However, a graph of "O" does not since at points, an X value has two Y values.

Nonexistent 09/01/09 + PM | QUOTE | PERMALINK | REPORT

Use something called the vertical line test. If you can place a vertical line ANYWHERE on the graph in a way that it will intersect 2 points on the line, that is not a function. Otherwise, it is a function.

Incedio654 09/01/09 + PM | QUOTE | PERMALINK | REPORT

So X^(1/2) and -[X^(1/2)] have more than one y value, thus making them not a function?

tunaonshoe 09/01/09 + PM | QUOTE | PERMALINK | REPORT

A function, use the line test. grammar

Nonexistent 09/01/09 + PM | QUOTE | PERMALINK | REPORT

Yeah, you got it.

CrayonScribble Sep 01 2009 + PM | QUOTE | PERMALINK | REPORT

A function is described as a process where a x value is changed into a y value. X^2, X^(1/2) and -[X^(1/2)], are all functions. However, a one to one function is the only type that can be inversed as it only has one x value to one y value. This one to one function can be called a true function. Something that would not be a function would be f(x): 1. For further help I did start a thread: http://www.basilmarket.com/forum/1193912/0//Homework_help_thread.html# NB: y= x^2 and y^2 + x^2 = n are one to many and many to many functions respectively

Revolt 09/01/09 + PM | QUOTE | PERMALINK | REPORT

A function is what it sounds like, it has to function in order for the equation to be...an equation.

Nonexistent 09/01/09 + PM | QUOTE | PERMALINK | REPORT

CrayonScribble : A function is described as a process where a x value is changed into a y value. X^2, X^(1/2) and -[X^(1/2)], are all functions. However, a one to one function is the only type that can be inversed as it only has one x value to one y value. This one to one function can be called a true function. Something that would not be a function would be f(x): 1. For further help I did start a thread: " title="http://www.basilmarket.com/forum/1193912/0//Homework_help_thread.html#[/quote]" target="_blank" class="basilLink">http://www.basilmarket.com/forum/1193912/0//Homework_help_thread.html#[/quote] I meant them as together. I didn't know how to type it out as one. I should have said x = y^2

Incedio654 09/01/09 + PM | QUOTE | PERMALINK | REPORT

Thanks guys.

CrayonScribble 09/01/09 + PM | QUOTE | PERMALINK | REPORT

No problem If you got more problems feel free to either PM me or ask in my thread.

Incedio654 09/01/09 + PM | QUOTE | PERMALINK | REPORT

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