# how you do graph polynomial functions having 3 as the highest degree or cubic?

By lonely_f16

@lonely_f16 (2147)

Philippines

September 6, 2007 5:21am CST

is it the same with linear functions...you just substitute a value to the x in the equation? please help!

1 response

@stvasile (7317)

• Romania

6 Sep 07

I don't really get the question...
You're asking about how to draw the function's graphic? Or how to solve the equation?
If you need to draw the graphic, yes, the method is pretty much the same, you give a certain value to x, you solve the equation and you get a y value. Then, you connect the points that have the (x,y) coordinates.
This is the easy way of drawing a graph and not the most precise.
If you know calculus, there is a certain algorithm of drawing a function's graph, that implies calculating its minimum or maximum points and the inflexion points (first and second derivate of the function) and checking weather the graph is ascending or descending between these points... All without giving values to x... But I'm guessing you haven't studied calculus by now.

@lonely_f16 (2147)

• Philippines

6 Sep 07

thank you for responding right away lolz.. i gather you're very intelligent in math..you're right we haven't studied calculus much less trigonometry yet..

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