1. Function Lab Chapter 9

2. Does the table represent a function? YES or NO XY 12 70 41 32 43 74 Remember: The “X”s are all different if it is a function Remember: The “X”s are all different if it is a function

3. Does the graph represent a function? YES or NO Remember: The graph of a function does not cross above or below itself. Remember: The graph of a function does not cross above or below itself.

4. Is this mapping a function? YES or NO Remember: The “X”s are all different if it is a function Remember: The “X”s are all different if it is a function HINT: The points in the mapping are … (8,7), (12,0), (12,3), (15,7) HINT: The points in the mapping are … (8,7), (12,0), (12,3), (15,7)

5. Does the set of ordered pairs represent a function? Yes or No (1,8), (2,11), (3,14), (4,17), (5,20) Remember: The “X”s are all different if it is a function Remember: The “X”s are all different if it is a function

6. What is the domain, range, and inverse of the table? XY -410 8 26 54 82 110 Remember: Domain – all the Xs Range – all the Ys Inverse – the points listed as (y,x) Remember: Domain – all the Xs Range – all the Ys Inverse – the points listed as (y,x)

7. F(x) = x + 15 Find these values 1.F(4) = 2.F(8) = 3.F(12) =

8. What are the domain, range, and inverse of the mapping below? Remember: Domain – all the Xs Range – all the Ys Inverse – the points listed as (y,x) Remember: Domain – all the Xs Range – all the Ys Inverse – the points listed as (y,x) HINT: The points in the mapping are … (3,4), (6,4), (10,2) HINT: The points in the mapping are … (3,4), (6,4), (10,2)

9. Find the domain, range, inverse of the function below: (5,10), (6,12), (7,14), (8,16), (10,18) Remember: Domain – all the Xs Range – all the Ys Inverse – the points listed as (y,x) Remember: Domain – all the Xs Range – all the Ys Inverse – the points listed as (y,x)

10. F(x) = x – 4 1.What is the output if the input is 13? 2.What is the range if the domain is 20? Remember: Domain – the input Range – the output Remember: Domain – the input Range – the output

11. Multiple Choice: Which function increases the input by 8? A.F(x) = x – 8 B.F(x) = x + 8 C.F(x) = 8x D.F(x) = x / 8