confused ..... y=xx
The problem is to graph this equation y=xx.
From what I understand of absolute values, this x would be positive. If it is positive then y=0 and there would be no points to graph. Is there something that I am missing? The question is worth 4 points, so I can't see the answer just being 0. Thanks for any suggestions. 
What happens when x is negative?

What I was taught to do when dealing with absolute value, is to rewrite the equation so that the absolute value is isolated, then find the 2 equations.
so you'll have: x=xy y=o and also: x=x+y 2x=y 
The absolute value of x would be x. But I remember with inequalities there are 2 possible answers with absolute value (,+). From what you are explaining it sounds like that is what you are saying to do, use both possible values. Then I would graph by beginning with y at 0 and continue by substituting values into 2x=y? That seems to make sense to me. Thank you both for your help!

Also just try plugging in some numbers:
For 2 > Y = 2  2 = 0 For 2  > Y = 2 2 = 2 2 = 4 see? So for negatives you have Y = 2X, X<0 
Solve or graph y = x  x.
If x>0, then y = x  x, meaning y=0. If x<0, then y = x  (x) [ notice those are parentheses, not absolute value notation symbols ], meaning y = x + x = 2x. 
Quote:
Quote:
Quote:
Quote:
Quote:

I rearranged the formula to isolate the absolute value.

Wow, you guys couldn't have made it any more clear for me. Thanks alot!

All times are GMT 5. The time now is 09:53 AM. 
Powered by vBulletin Copyright ©2000  2014, Jelsoft Enterprises Ltd.
© 2014 Physics Forums