# Problem With Graphing Cubic Functions on TI-89 Titanium

• Aug 3rd 2012, 03:28 PM
rajschaudhry
Problem With Graphing Cubic Functions on TI-89 Titanium
When I graph a cubic function, all the positive x-values are being shown. However, all of the points that have a negative x-value are not being shown on the graph. Does anyone have a solution to this?
• Aug 3rd 2012, 07:36 PM
Prove It
Re: Problem With Graphing Cubic Functions on TI-89 Titanium
• Aug 7th 2012, 04:12 PM
rajschaudhry
Re: Problem With Graphing Cubic Functions on TI-89 Titanium
Yep, i tried it. I put in my equation as x^1/3, maybe that is the problem?
• Aug 7th 2012, 04:24 PM
Prove It
Re: Problem With Graphing Cubic Functions on TI-89 Titanium
Quote:

Originally Posted by rajschaudhry
Yep, i tried it. I put in my equation as x^1/3, maybe that is the problem?

For starters, x^(1/3) is NOT a cubic, it's a cube ROOT. Is this what you are trying to graph, or should it be a cubic like x^3?
• Aug 7th 2012, 04:57 PM
skeeter
Re: Problem With Graphing Cubic Functions on TI-89 Titanium
screen 1 ... entering y = x^(1/3)

screen 2 ... how it looks after you enter it

screen 3 ... graph of x^(1/3) in a decimal window