McGraw Hill Glencoe Algebra 1, 2012
MH
McGraw Hill Glencoe Algebra 1, 2012 View details
6. Relations
Continue to next subchapter

Exercise 28 Page 44

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

Ordered Pairs: (-2,3),(-1,2),(0,-1),(1,-2),(2,1)
Domain: {-2,-1,0,1,2}
Range: {-2,-1,1,2,3 }

Practice makes perfect

Before we find write the ordered pairs of the given points, let's remember how we read a coordinate plane. Points on a coordinate plane are written as (x,y). The x-value tells us the number of units we moved to the left or right from the origin and the y-value tells us how many units we moved up or down.

To find the x-coordinate of each point, we will draw a vertical line until we hit the x-axis. Similarly, to find the y-coordinate, we will draw a horizontal line until we hit the y-axis.

Now let's list the ordered pairs that we found. (-2,3),(-1,2),(0,-1),(1,-2),(2,1) The domain of a function is found by listing the x-values of the relation. The range is found by listing the y-values of the relation. Domain:& {- 2,- 1,0,1,2 } Range:& {3,2,- 1,- 2,1 }

Extra

Further Information
If you would like to learn more about mathematical relations, or about domain and range, please check out our original content!