9/15/2010

Agenda
i. Bell Ringer
ii. Home Work Review
iii. Linear Equations

Objective: Students will be able to model real world situations as linear functions.

i. Bell Ringer

find the equation of the two points (3,5)(2,1)

m=1-5 =-4 4 being you slope
---- --- = 4
2-3 -1


So now plug it in
y-y1=m(x-x1)
y-5=4(x-3)
y-5=4x-12
y=4x-7
* both in bold could be used as a answer

Find the equation of a parallel line
- since its parallel it has the same slope
y=4x-8 <<
Find the equation of a line to (-8,4)
y-4=--1/4(x- -8)
y - 4 = -1/4 (x + 8)
y - 4 = -1/4x - 2
y=-1/4+2


ii. Home Work Review
5.
(-1,4) (5,-8) find the slope

8 - 4 4 2
----- = -- = --
5 +1 6 3
y-4 = 2/3 (x+1)

7.
(5,-7)
if its horizontal y stays the same
y = -7
if its a vertical x stays the same
x= 5
14.
x-3y = 9
-x -x
-3y = -x +9
---- ------
-3 -3 -3

y= 1/3x -3

9.
(2,-7) (2,3)
if m is undefined the equations is xb

I'M NOT ADDING THE LAST 2

iii. pg 19 Linear Functions
f (x) = 1x+3
g(x) = 3x-2
l(T) = 0.0001T+10
g(s) = -1.2s +4.7
h(t) = 3


pg. 20
Rent was $200 p= profit
Tickets were $5
p(t) = 5t - 200 t= tickets
0>5t - 200
+200 + 200

200>5t
--- --
5 5
40>t



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Question;
1. How many people a dropping this class? (j/k)

2. If I'm throwing a party and I have to pay 150 for the dj , 200 for the location and and 150 food how many $10 tickets do I have to sell to start making a profit?
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this took forever =[