WebGraphing.com Homepage Welcome Guest   | Login   
  Search  
  Index  | Recent Threads  | Who's Online  | Register  | Search  | Help  | RSS feeds



Quick Go »
Thread Status: Normal
Total posts in this thread: 3
[Add To My Favorites] [Watch this Thread] [Post new Thread]
Author
Previous Thread This topic has been viewed 49752 times and has 2 replies Next Thread
Female beckbrumfil

Member's Avatar

USA
Joined: Apr 18, 2008
Posts: 11
Status: Offline
applause   Tables/ Algebra Reply to this Post
Reply with Quote

a) Y= square root x-2, fill in the following table for x = 0,1,2,3,4. Round to three decimal places where necessary.

x y
0
1
2
3
4




b) Explain why no negative values are chosen as values to substitute in for x.
[Jul 3, 2008 3:42:45 AM] Show Post Printable Version        Hidden to Guest    netzero.com [Link] Report threaten post: please login first  Go to top 
Female beckbrumfil

Member's Avatar

USA
Joined: Apr 18, 2008
Posts: 11
Status: Offline
biggrin   Re: Tables/ Algebra Reply to this Post
Reply with Quote

okay I finally figured this out after many hours studying.

If y=sqrt of x-2 , fill in the following table for x = 0,1,2,3,4. Round to three decimal places where necessary.



x y
0 0 y=?0-2=0-2=0,
1 1 y=?1-2=1-2=1
2 1.41 y=?2-2=2-2=1.41
3 1.73 y=?3-2=3-2=1.73
4 2 y=?4-4-2=2

Explain why no negative values are chosen as values to substitute in for x.
Answer: Because when graphing a square root equation such as y=x, only values x are greater that 0, can be substituted in for x, can be used, because the square root of a negative number is not real.

Now just put your xand y values in the excel, highlight them and
insert scatter chart x&y. draw your line and add gridlines, and you are done.
[Jul 8, 2008 11:07:30 AM] Show Post Printable Version        Hidden to Guest    netzero.com [Link] Report threaten post: please login first  Go to top 
Female shujaat


Pakistan
Joined: Aug 1, 2008
Posts: 2
Status: Offline

Re: Tables/ Algebra Reply to this Post
Reply with Quote

y=sqrt of(-2),x=0
y=sqrt of(-1),x=1
y=0,x=2
y=1,x=3
y=sqrt of(2),x=4


for x=0,1 value of y is a comlex no.
[Aug 1, 2008 7:48:43 AM] Show Post Printable Version     [Link] Report threaten post: please login first  Go to top 
[Show Thread Printable Version] [Post new Thread]