Question

Write the ordered pairs for the relation. Find the domain and range.

{(–2, 5), (–1, 2), (0, 1), (1, 2), (2, 5)}; domain: {–2, –1, 0, 1, 2}; range: {1, 2, 5}
{(5, –2), (2, –1), (1, 0), (2, 1), (5, 2)}; domain: {–2, –1, 0, 1, 2}; range: {1, 2, 5}
{(–2, 5), (–1, 2), (0, 1), (1, 2), (2, 5)}; domain: {1, 2, 5}; range: {–2, –1, 0, 1, 2}
{(5, –2), (2, –1), (1, 0), (2, 1), (5, 2)}; domain: {1, 2, 5}; range: {–2, –1, 0, 1, 2}

Answer 1

The domain is {1, 2, 3, 4}
The range is {3}
The domain is the x-axis points, and the range is the y-axis points. Whenever a number is repeated, you DO NOT have to write it twice. Remember, on a graph the x-axis goes horizontally (left to right), and the y-axis goes vertically (up and down).

Answer 2

Here's some extra info. you might need to know. Now with functions, one way you could find out if it is a function is to use a mapping diagram. Make a list of the domain and range in least to greatest. Next, draw an arrow from the domain to the range that goes with it. If there is ONE arrow coming from each domain, it IS a function. If it is not, then it IS NOT a function. Another way you could do it is by using the vertical line test. Draw a graph, and plot out your points. Then, you use a pencil or even your finger to move left and right and see if it covers two or more points. If it does, it IS NOT a function. If it does not, then it IS a function. Hope that I have helped you!

Answer 3

A