1. 1.2 Warm Up Write the formula to solve the problem & solve the problem! You are putting tile on part of the walls in your kitchen. You need to use 500 tiles and want 3 times as many plain tiles as decorative tiles. How many of each kind will you need? You are putting fence around a rectangular garden whose length is twice its width. You use 90 ft of fencing. What are the dimensions of the garden? *Write any work and answer for all warm ups!

2. 1.2/1.3 Representing Functions

3. Vocabulary Function ________________________ ________________________________ Domain _________________________ Range __________________________ Independent variable_______________ Dependent variable________________ Inputs _________________________ Outputs ________________________

4. Examples What is the domain? Range? Domain ______________________ Range _______________________

5. Examples Given the function y = ½x – 3 with a domain of 2,4,6,8 make a table and identify the range. * When dealing with fractions, please use improper fractions, not mixed numbers!!!!!!!!!!

6. Writing equations from tables... What happens to the output values as the input value is increasing by 1? What is the output value when the input value is 0? These two questions will help you determine the rule for the given function.

7. Writing an equation (function rule) by looking at a table...

8. Graphing Functions Graph the function by first making an input-output table and then plotting the ordered pairs on a graph. Remember... x values are the ____ and y values are the _____.

9. Graph the function... y = ½x – 2 Domain: 0,2,4,6

10. Writing an equation (rule) from a graph... Make an input-output table first and then determine the equation as we have already discussed.

11. Last example! Make a table for the graph and write a rule for the function. Identify the domain and range. Domain ____________________________ Range_____________________________ Equation __________________________