Objective To write linear equations to describe

1
Objective- To write linear equations to describe
situations and solve problems.
Snowflake Problem
Instance 1 2
3 4
Number of Chips 7 13
19 25
I
C
Let I Instance or Design .
1 7 2 13 3 19 4 25 5 31
Let C Number of Chips Used.
6
C is dependent on I
6
6
C ___I ___
6
1
6
2
Objective- To write linear equations to describe
situations and solve problems.
Snowflake Problem
Instance 1 2
3 4
Number of Chips 7 13
19 25
I
C
Let I Instance or Design .
1 7 2 13 3 19 4 25 5 31
Let C Number of Chips Used.
6
C is dependent on I
6
Change
Start Value
6
C I
6
1
6
3
Objective- To write linear equations to describe
situations and solve problems.
Snowflake Problem
Instance 0 1 2
3 4
Number of Chips 7 13
19 25
I
C
Let I Instance or Design .
1 7 2 13 3 19 4 25 5 31
Let C Number of Chips Used.
6
C is dependent on I
6
Change
Start Value
6
C I
6
1
6
4
This chart shows the price of salad at a local
market.
1) How much would a 6 oz salad cost?
1.65 0.25 1.90
0.25
0.25
2) Write an equation for the cost of a salad
that weighs w oz.
0.25
0.25
Let p price of salad
3) How much would a 10 oz salad cost?
p 0.25 w
0.40
p 0.25 w 0.40
Change
Start Value
p 0.25 ( 10 ) 0.40
p 2.50 0.40 2.90
5
A taxi cab charges a flat rate of 2.50 and 15
c per mile. Write a linear equation for the
charge in terms of the number of miles driven.
Let C charge in dollars
Let m of miles driven
C 2.50 0.15 m
Change
Start Value
6
A phone company charges 17.50 for the first 30
minutes of toll charges and 12 c for each
additional minute . Write a linear equation
for the charge in terms of the number of minutes.
Let C charge in dollars
Let m of minutes
m
C
1 17.50 10 17.50 20 17.50 30 17.50 31
17.50 0.12 32 17.50 0.24 33 17.50 0.36
C 17.50 0.12 m
Change
Start Value
C 17.50 0.12 (m- 30) for m gt 30