1. Section 2.3
Function Notation and
Making Predictions

2. Finding the Domain and Range of a Function
Example
A store opens at 9 A.M. to 5 P.M., Mondays through Saturday. Let be an employee’s weekly income (in dollars) from working t hours each week at $10 per hour.
1. Find an equation of the model f.
The employee’s weekly income (in dollars) is equal to the pay per hour times the number of hours worked per week:
Solution
Section 2.3
Slide 2

3. Finding the Domain and Range of a Function
Example Continued
Find the domain and range of the model f.
To find domain and range we consider input-output
Store is open 8 hours a day, 6 days a week, the employee can work up to 48 hours per week
So, the domain is
Since hours worked is between 0 and 48 hours, inclusively, the pay is between 0 and 48(10)
Solution
Section 2.3
Slide 3

4. Finding the Domain and Range of a Function
Solution Continued
Range is
The figures illustrate inputs of 22, 35, and 48 being sent to the outputs 220, 350 and 480, respectively
Label the t-axis that represents the domain and the part of the I-axis that represents the range
Section 2.3
Slide 4