1. Functions and Their Graphs
Notes 2.1 (Day 2)
Functions and Their Graphs

2. Graphing x y t-charts Step 1: In the x column, choose -1, 0, and 1
Step 2: Solve for the corresponding y value
Step 3: graph the points
Step 4: Connect the points
Step 5: Make sure the line is continuous

3. Example: Graph the equation using an x y t-chart.
y = x – 4

4. Example: Graph the equation using an x y t-chart.
y = 2x + 1

5. Example: Graph the equation using an x y t-chart.
y = -2x +4

6. How to Write in Function Notation:
1. Solve for y
2. Replace y with f(x)
y and f(x) are interchangeable, they mean the same thing

7. Evaluating Functions
Evaluate the function when x = -2

8. Evaluating functions:
Evaluate the function when x = -3

9. Evaluate the function when x = 3

10. Evaluate the function when x = -3

11. Evaluate the function when x = -1

12. Homework: P