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

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

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

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

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

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

Evaluating Functions Evaluate the function when x = -2

Evaluating functions: Evaluate the function when x = -3

Evaluate the function when x = 3

Evaluate the function when x = -3

Evaluate the function when x = -1

Homework: P 77 25-39