Houghton Mifflin Harcourt Algebra 1, 2015
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Houghton Mifflin Harcourt Algebra 1, 2015 View details
2. Understanding Relations and Functions
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Exercise 2 Page 102

The number of points place finish is worth depends on the won place.

Table:

Place won in a track meet Number of points that place finish is worth
1 5
2 3
3 2
4 1
5 0

Graph:

Mapping Diagram:

Practice makes perfect
We are given a relation between the place won in a track meet and the number of points that place finish is worth. Points depends on the place. Therefore, we can say that the won place is the independent variable x and the number of points is the dependent variable y. {(1,5),(2,3),(3,2),(4,1),(5,0)} This means that the x-values in the ( x, y) coordinate pairs of the given relation represent the place won. The y-values represent the number of points that place finish is worth.

Table

Let the first column represent the place won in a track meet and the second column represent the number of points.

Place won in a track meet Number of points that place finish is worth
1 5
2 3
3 2
4 1
5 0

Graph

For the graph, let the x-axis represent the won place. The y-axis will be the number of points that place finish is worth.

Mapping Diagram

In the mapping diagram, the left column will be the won place and the right column will be the number of points that place finish is worth.