graphing the square root of 9-x^2

me....

New member
Joined
Sep 3, 2007
Messages
19
hey all...
how do i graph the square root of 9-x^2
:?
 

Mrspi

Senior Member
Joined
Dec 17, 2005
Messages
2,128
Re: graphing please help me!!

me.... said:
hey all...
how do i graph the square root of 9-x^2
:?
umm.....do you mean

y = sqrt(9 - x^2)

I ask because in any problem where you are asked to graph, you should have two variables.

If it IS y = sqrt(9 - x^2)

you can plot points. Pick values for x, and find the corresponding values of y for each of them.

Of course, you need to recognize that you can't have a negative number under the radical sign, so 9 - x^2 >= 0. That limits the values you can use for x....you can't use any value of x which makes 9 - x^2 < 0.

Tell us what you have done to plot some points. When we can see your work, we can determine where it is that you need assistance.
 

me....

New member
Joined
Sep 3, 2007
Messages
19
thank you...that should help...yeah it says f(x) which is the same as y....so thank you very much...
 
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