Title: Lesson 4-6
Author: mark_cameron
Last saved by: MHE
Company: McGraw-Hill

Lesson 1-10
EXAMPLE     Make a Function Table
1. BAKERY   Suppose a loaf of bread costs $3.  Make a function table that shows the total cost for 1, 2, 3, and 4 loaves of bread.  Then identify the domain and range.

 The domain is {1, 2, 3, 4}, and the range is {3, 6, 9, 12}.

Real-World EXAMPLE 
Input | Function Rule | Output

Number of 
Loaves of Bread

Multiply
        by 3

Total
 Cost ($)

1 | 3 × 1 | 3
2 | 3 × 2 | 6
3 | 3 × 3 | 9
4 | 3 × 4 | 12
2. SAILING   The top speed reached by a sailboat during a race is 6 miles per hour.  Write an equation using two variables to show the relationship between the number of hours h a sailboat travels at its top speed and the distance d it travels.

Input | Function Rule | Output

Number of
  Hours

Multiply
       by 6

Distance
Traveled

1 | 1 × 6 | 6
2 | 2 × 6 | 12
3 | 3 × 6 | 18
h | h × 6 | 6h

 Words	Distance traveled equals number of hours times 6 miles per hour.

 Variable	Let h represent the number of hours traveled.
		Let d represent the distance traveled.

 Equation	d = 6h

Real-World EXAMPLE
3. SAILING  How far does the sailboat travel at during a 3 hour race at top speed?

 d = 6h		Write the equation.
 d = 6(3)		Replace h with 3.
 d = 18		Multiply.

 The sailboat travels 18 miles during the 3 hour race at top speed.