1. Algebra 1 Section 1.7 Identify functions and their parts
In a function the input may not be repeated. The set of inputs is called the domain. The set of outputs is called the range.
A function is a rule that shows a relationship between two quantities called the input and the output.

2. Name the domain and range. Is it a function?

3. Functions can also be expressed as a rule or an equation.
Make an input-output table for the function.
y = 2x + 3
Use 1, 2, and 3 for the domain.

4. Page 47 example 2
The total pressure under water equals the surface pressure plus the water pressure.

5. Ways to illustrate a function
1. input-output mapping
2. input-output table
3. rule-equation
4. graph
5. verbal description

6. Assignment
Page 49
Problems even, all, all,
47,50,54