View Full Version : express relation shown in each table...; write inv. relation

10-14-2008, 03:59 PM
hey please help :] on my homework sheet it says express the relation shown in each table,mapping,or graph as a set of ordered pairs, then write the inverse of the relation and it shows a table, a mapping and a graph but i donty get what its telling me to do. please help :]
thanks- rae rae

10-14-2008, 05:15 PM
Hello Ray:

It's not easy for me to know what the mapping or graph looks like. Somehow, you need to identify the numbers associated with one variable, the rest of the numbers will then be associated with the second variable, and you pair up one number from each set to form ordered pairs.

With a table of values, it seems more straightforward.

x - y
1 - 2
2 - 5
3 - 15
4 - 22

Here, the ordered pairs are:

(1, 2)
(2, 5)
(3, 15)
(4, 22)

The set of all of the ordered pairs generated by the table expresses the relationship, so just write them down.

The inverse relationship is shown by reversing the order of the variables.

(2, 1)
(5, 2)
(15, 3)
(22, 4)

I'm not sure whether or not the inverse is using the same table, or a different one.

Is there only one table, one mapping, and one graph provided in this exercise?

Or, do you have a second table, a second mapping, and a second graph for the inverse part of the question?

I regret that I cannot see your actual exercise.


~ Mark :)