1. Functions
Teacher Twins©2014

2. Warm Up Solve each equation. 2x – 6 = 22 3 + 5x = -32 X + 29 = 14

3. Functions

4. What is a Function?

5. What is a Function?
Each input value gives back exactly one output value.
Example: Input 7 into y = 2x + 9.
x = 7
y = 2(7) + 9
y = 23
Input is 7 output is 23.

6. Find the output when given the input for the function. y = x - 5
Remember x is the input and y is the output. -6 -5 -4 -3

7. Complete the function table.
- 11
- 10
1 - 10
- 9
2 - 10
- 8

8. Another name for the input (x value)
is domain.
Another name for the output (y value) is range.

9. What is the domain? What is the range?
(-3, 8), (0,7), (-4,-6), (2, -5)
Domain = - 4, - 3, 0, 2
Range = - 6, - 5, 7, 8

10. {10, 40, 61}

11. Closure
Find the range of the function y = 4x if the domain is {-1, 0, 1, 2}.
{-4, 0, 4, 8}