Exercise 67 Page 80

How would you go about finding the values in each ordered pair from the graph?

Is It a Function? No
Domain: {-2,1,2,3,4}
Range: {2,3,-2,-1 }

Practice makes perfect

To find the x-coordinate of a point, we move vertically until we hit the x-axis. Similarly, to find the y-coordinate, we move horizontally until we hit the y-axis.

Now, let's list the ordered pairs that we found. (-2,2),(1,2),( 2, 3),( 2, -2),(3,-1),(4,2) The domain of a function is found by listing the relation's x-values. The range is found by listing the relation's y-values. Domain:& {- 2,1,2,3,4 } Range:& {2,3,-2,-1 } Observing the list we can see that there are two different y-values for one x-value. Therefore, this relation is not a function.

Subchapter links

Lesson Check p.78

Practice and Problem-Solving Exercises p.78-80

Standardized Test Prep p.80

Mixed Review p.80

Exercise 67 Page 80

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