The document discusses the concept of functions as special relationships between inputs and outputs, explaining their role in various real-life applications such as temperature conversion, digital photography, and computer science. It highlights the different types of functions and their usage in fields like medicine, engineering, and internet data management. Overall, it emphasizes the importance of functions in structuring and optimizing tasks across multiple domains.

1. REAL LIFE
APPLICATION OF
FUNCTION
SUBMTTED TO
MD. ABDUL HANNAN
LECTURER
DEPARTMENT OF SOFTWARE ENGINNERING
DAFFODIL INTERNATIONAL UNIVERSITY

2. Section : A
ID : 232-35-016
Reduan Ahmad

3. • A function is a special type of
relation where each input only has
one output.
• Functions are a way of connecting
input values to their corresponding
output values.
• The relation is a function if, for every
x-value, there is exactly one y-
value.
WHAT IS A FUNCTION?

4. Functions are a way of connecting input
values to their corresponding output values.
Example:
Ordering a coffee for $5
Pay $5, and you get 1 coffee.
Pay $10, and you'll get 2 coffees, and so
on.
The input affects the output in a predictable way.
WHAT IS A FUNCTION?

5. Section : A
ID : 232-35-003
Md. Abdullah Al Noman

6. One-to-one Function. (Injective)
Many-to-one Function.
Onto Function (Surjective)
Into Function, etc
TYPES OF FUNCTION
One-one Correspondent Function
There are many types of functions....

7. REAL LIFE APPLICATION OF FUNCTION
Functions uses in almost everything in daily life..
of them some of are.........
Physics Digital
Photography
Environmental
science
Medicine Engineering
Computer Science

8. Section : A
ID : 232-35-022
Mohammad Ali Nayeem

9. Example:
• Inputs: The input to the function is the temperature
value in one scale (Celsius or Fahrenheit).
• Outputs: The output of the function is the
temperature value in the other scale.
TEMPERATURE CONVERSION
AS A FUNCTION
In discrete mathematics, a function is a rule that assigns exactly one
output to each input. Temperature conversion between Celsius and
Fahrenheit can be modeled as a function.

10. Example:
• f(°C) = (9/5) × °C + 32 (converts Celsius to
Fahrenheit)
• f(°F) = (5/9) × (°F - 32) (converts Fahrenheit to
Celsius)
FUNCTION FORMULAS:
The formulas we saw earlier for temperature conversion can be
expressed mathematically as functions:
By applying functions, we can solve temperature conversion
problems in a structured and efficient manner, which aligns with
the principles of discrete mathematics.

11. Section : A
ID : 232-35-024
Adnan Iqbal

12. Digital photography involves the use of
functions in several aspects of the process,
from capturing images to editing and
printing.
1. Image Capture: Functions govern exposure, aperture, and
shutter speed relationships.
2.Image Processing: Functions adjust brightness, contrast, color
balance, and sharpness.
3.Image Compression: Functions reduce file size while maintaining
image quality.
4.Digital Printing: Functions translate digital color values into
physical output.
5.Image Analysis: Functions detect patterns, identify objects, and
measure distances.
6.Image Recognition: Functions classify objects based on learned
patterns and features.
DIGITAL
PHOTOGRAPHY

13. Functions make internet data usage easier by tracking, limiting, predicting,
costing, controlling speed, and optimizing performance.
1. Tracking: Functions track data use, helping manage plans.
2.Limits: Functions enforce caps to control usage.
3.Sharing: Functions divvy up bandwidth for smooth performance.
4.Prediction: Functions foresee future needs, aiding planning.
5.Cost: Functions calculate costs based on usage.
6.Throttling: Functions slow excess usage, avoiding congestion.
7.Priority: Functions prioritize traffic for consistent speed.
8.Efficiency: Functions optimize network for better performance.
INTERNET
DATA USAGE

14. Section : A
ID : 232-35-066
Rashedul Islam

15. In computer science, functions are crucial tools
used for structuring code, improving readability,
and promoting reusability. Here's how they are
used across various domains:
x
6 8 10 12
ANSWER
KEY
FUNCTIONS IN COMPUTER
SCIENCE:
1. Programming:
Functions encapsulate a set of instructions that can be
executed independently, making code modular and easier
to manage. They help in breaking down complex tasks into
smaller, manageable parts, enhancing code organization
and readability.

16. 2. Algorithms:
Functions play a vital role in implementing algorithms. Algorithms often
involve repetitive tasks or computations, which can be efficiently handled
using functions. By defining functions, algorithmic logic becomes more
structured and easier to comprehend.
3. Database Management:
In database systems, functions are used to encapsulate frequently used
queries or operations. They promote code reuse, reduce redundancy, and
enhance the maintainability of database-related tasks.

17. Section : A
ID : 232-35-214
Asraful Alam

18. Functions are extensively used in
engineering for various real-life
applications. Here are a few examples:
Electrical Engineering
Mechanical Engineering
Civil Engineering
FUNCTIONS IN ENGINEERING
Aerospace Engineering
Biomedical Engineering

19. From this presentation we learnt about
What is function, types of function, how
we use function in real life.......