1. Math Log #35
A satellite company charges an installation fee of $50 plus an additional $39.95 per month for service. Write a function to represent the total cost of any number of months of service. Make a function table to find the total cost for 1, 2, 3, 4, or 5 months.

2. Math Log # answers
I - A satellite company charges an installation fee of $50 plus an additional $39.95 per month for service. Write a function to represent the total cost of any number of months of service. Make a function table to find the total cost for 1, 2, 3, 4, or 5 months.
Domain
Rule
Range X
Y = $39.95x + $50 Y 1
$39.95(1) + $50
$89.95 2
$39.95(2) + $50
$129.90 3
$39.95(3) + $50
$169.85 4
$39.95(4) + $50
$209.80 5
$39.95(5) + $50
$249.75
C – y = $39.95x + $50
A – The function to represent the total cost of any number of months of service is y=$39.95x + $50.
N – Neighbor

3. Module 6 Lesson 4 and 5 Outcome:
Students describe qualitatively the functional relationship between two types of quantities by analyzing a graph.

4. Identifying Linear and Nonlinear Functions
Check to see if the rate is constant
Find the change in y over the change in x
If the rate is constant, then the function is linear
Graph the points on a coordinate plane
If the points form a straight line, then the function is linear

5. Increasing and Decreasing Functions
The linear function whose graph has a positive slope is said to be an increasing function.
A linear function whose graph has a negative slope is said to be a decreasing function.
A linear function whose graph has a zero slope is said to be a constant function.
A vertical line is linear but is not a linear function.

6. Page 19 Exercise 1

7. Page 20

8. Page 21

9. Page 22

10. Page 23

11. Homework
Complete page (1-4)