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3.4 S KM & PP 1
Equations of Lines
3.4 S KM & PP 2
Linear Equations
CByAx
bmxy
)xx(myy 11
3.4 S KM & PP 3
What’s my line?
bmxy
)xx(myy 11
3
2m ),(P 15
Clues!
)x()(y 53
21
3.4 S KM & PP 4
Look Closely!
bmxy
)xx(myy 11
4
3m ),(P 50
Aha!
54
3
xy
3.4 S KM & PP 5
Where’s m ?
12
12
xxyy
m
)xx(myy 11
),(P 861
Uh oh!
),(P 742
)( 64
87
2
1
))(x(y 62
18
3.4 S KM & PP 6
Look !
),(P 1731 ),(P 1742
17y
3.4 S KM & PP 7
I bet I can’t fool you !
),(P 1731 ),(P 032
3x
3.4 S KM & PP 8
A Chemistry Problem?
In the Fahrenheit system, water freezes at 32oF
and boils at 212oF.In the Celsius system, water freezes at 0oC and boils at 100oC.
Using (F, C) , (32o , 0o), and (212o, 100o)
determine a formula to calculate C if F is known!
3.4 S KM & PP 9
A Chemistry Problem - clues?
(F, C) (32o , 0o) (212o, 100o)
)xx(myy 11
)FF(mCC 11
9
5
180
100
32212
0100
m
3.4 S KM & PP 10
A Chemistry Problem - clues?
(F, C) (32o , 0o) (212o, 100o)
)FF(mCC 11
(F1, C1)
)F(C 329
50
9
160
9
5 FC
3.4 S KM & PP 11
Up in the Air?
An ultralight crop duster is climbing at a rate of 800
ft/min.
Write an equation which gives the height of the
plane in terms of the time after take off.
What is the height 3 minutes after take off?
3.4 S KM & PP 12
Up in the Air – Clues!
An ultralight crop duster is climbing at a rate of 800
ft/min.
3.4 S KM & PP 13
Up in the Air – Clues!
The crop duster takes off from ground level. So his height at
the start is 0 feet.
3.4 S KM & PP 14
Up in the Air – Clues!
What is the height 3 minutes after take off? t = 3
3.4 S KM & PP 15
That’s All for Now!
