1. Presentation
Department: Business Administration
Course Title: Remedial Mathematics
Course Code:MAT-012
PRE PARE D FOR
Arpita Chakraborty
Lecturer Department of CSE
Leading University, Sylhet

2. Title of presentation
Every function is relation but all
relation are not function
PRE PARE D BY
Faglul Karim Raihan
ID: 1001010142
Sec-C, 1th Semester (24th Batch)
Department of Business Administration
Leading University, Sylhet, Bangladesh
Date of Presentation:21/04/2010

3. What is relation?
A "relation" is just a relationship
between sets of information.

4. What is function?
A function species a rule by which an
input is converted to a unique output.

5. Every function is a relation but
all relation are not function
• Every function is one type of relation
because every function creates by
making an one way relation. But
relation makes from both side for
that reason all relation are not
function.

6. Description by Drawing
a b
Drawing (a) is a function as it makes
one way relation but drawing (b)
makes relation from both side that’s
why it only a relation.

7. Function and Relation
in Vertical line
a
This graph shows a function, because
vertical line cross this graph in one
point and it also shows a relation.

8. b b
These graph shows a relation,
because vertical lines cross these
graph more than one point and It's
not a function.