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beckbrumfil

USA
Joined: Apr 18, 2008
Posts: 11
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Tables/ Algebra

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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]

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beckbrumfil

USA
Joined: Apr 18, 2008
Posts: 11
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Re: Tables/ Algebra

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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]

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shujaat

Pakistan
Joined: Aug 1, 2008
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Re: Tables/ Algebra

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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]

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