math help today please?

2015-03-03 6:20 am
f (x)=x^2-6 what's the range of the function when domain is {0 1 2 3}
A) - 6, - 4, - 2 ,0 B)- 6, - 5, - 2, - 3 C)- 3, - 2 ,- 1 ,0 D)0, 1, 2, 3

area of a rectangle is 90.equation (w+ 9)=90 can be used to determine the width(w) of the rectangle what is the width of the rectangle?
A)6. B)9. C)10 D)15

回答 (2)

2015-03-03 6:29 am
✔ 最佳答案
In its simplest form the DOMAIN is all the values that go INTO a function.
For a memory aid, domain ends in IN. domaIN.

and the RANGE is all the values that come OUT.

So put in the numbers, and see what the output is:
0, -6
1, -5
2, -2
3, 3
Answer B.
Note: There is no magic here, we needed the definition.
Then we simply calculated each value.
2015-03-03 6:23 am
(0,-6)


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