SOLUTION: Find the domain and the range after graphing: y= x2 - 1
I am not understanding the process in which you find the domain and the range.
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-> SOLUTION: Find the domain and the range after graphing: y= x2 - 1
I am not understanding the process in which you find the domain and the range.
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Question 103943This question is from textbook intermediate algebra
: Find the domain and the range after graphing: y= x2 - 1
I am not understanding the process in which you find the domain and the range. This question is from textbook intermediate algebra
You can put this solution on YOUR website! Find the domain and the range after graphing: y= x^2 - 1
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Domain:
Start with the assumption that the domain is "all Real Numbers".
Then look at your equation to see if certain forms there restrict
the values of "x":
Examples:
1/(x-2) which means x cannot "2"
sqrt(x-2) which requires that x be >=2
log(x-2) which requires that x be >=2
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Your problem:
None of these restrictions are present so the domain is "All Real Numbers".
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Range:
Your problem:
y=x^2-1
For all Real numbers, x^2 is >=0
So for x^2-1, y will be >=-1
So the range is "All Real Numbers >=-1"
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Cheers,
Stan H.
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