1. 2.2
Linear relations and functions

2. Linear Non Linear 4x-5y=7 3x-2y2 =5 X=7 3xy=7 Y=5/x Y=-5X+6 x+xy =4

3. A function whose ordered pairs satisfy
Y = 3 X
Dependent
Constant
Independent
Linear function :
A function whose ordered pairs satisfy
F(x)= mx + b

4. Some definitions
Linear Relation: Is a relation in which the graph of the relation is a
Linear equation : the exponent no greater than and does not contain
division operation for the variables .
ONE

5. 3)
Standard form
A X B Y = C
Integers

6. Y- intercept X- intercept Y - AXIS X - AXIS
4) The Y – coordinate of the point at a which a graph crosses the 5 ) The X – coordinate of the point at a which
Y- intercept
Y - AXIS
X- intercept
X - AXIS

7. Is a straight line passing through
Example :
9X = 3Y + 12
Simplify:
3X = Y + 4
Linear Function :
Y = 3 X – 4
F( x ) = 3 x – 4
Standard Form:
3 x – y = 4
X – intercept ( y = 0 )
Y = 3 X – 4
O= 3x x = 4/3
y – intercept ( x = 0 )
Y = 3 X – 4
Y= 3( 0) y= - 4
9X = 3Y + 12
Is a straight line passing through
( 0 , -4 ) and ( 4/3 , 0 )