FUNctions !! 

1. By: Baylee McBride FUNctions!!

2. Real-World Problem • Sally is trying to figure out how much her bill cost for texting each month for 6 months. She sent 102, 105, 122, 127, 139, and 155 text messages. If text messages cost 10 cents per text how much money did it cost each month?

3. The Equation • The equation to my problem is …. x(.10)=y or f(x)= x(.10) X= text messages (independent) Y= bill (dependent)

4. Independent and Dependent The independent variable is my x value which is the number of text messages sent. The dependent variable is my y value which is the cost of the bill per month. We know that y DEPENDS on x. So the total cost of her bill per month DEPENDS on the number of text messages she sends per month.

5. Table of Values

6. Domain and Range • Domain is the x values. • Range is the y values. • So my domain is {102, 105, 122, 127, 139, 155} • My range is {1020, 1050, 1220, 1070, 1390, 1550}