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Algebra
- Thread starter pslagle
- Start date
pslagle said:Determine whether each table expresses the second variable as a function of the first variable.
s w
5 17
6 17
-1 17
-2 17
-3 17
7 17
8 17
I am having alot of difficulty understanding this. Please help.
For a function, there must be a recognizable relationship between the values for the first and the second variable. For example, if you were given this table:
x y
1 2
2 4
3 6
4 8
... you can rather quickly see that y = 2*x. It's clear that to get the y-value, simply multiply the x-value by 2. Y is clearly obtained by some operation involving x.
That's what is meant by "the second variable [is expressed] as a function of the first variable."
In your problem table, do you recognize what is being done to s in order to obtain w? Is there a recognizable relationship between the values given for s and the values for w?
Your example is very easy to understand. I cannot find any relationship with the two sets of numbers, I have tried multiplying, adding, dividing, etc. these are other examples that I have no problem figuring out.
x y
1 1
4 2
9 3
16 4
25 5
36 6
yes
t v
2 2
-2 2
3 3
-3 3
4 4
-4 4
5 5
yes
a p
2 2
2 -2
3 3
3 -3
4 4
4 -4
5 5
no
x y
1 1
4 2
9 3
16 4
25 5
36 6
yes
t v
2 2
-2 2
3 3
-3 3
4 4
-4 4
5 5
yes
a p
2 2
2 -2
3 3
3 -3
4 4
4 -4
5 5
no
Well, just answer: "not a function" and quit losing sleep :wink:pslagle said:Determine whether each table expresses the second variable as a function of the first variable.
s w
5 17
6 17
-1 17
-2 17
-3 17
7 17
8 17
I am having alot of difficulty understanding this. Please help.