1. CS 3.1: Proportions with Percents
1) Learning Target: I can use proportional relationships to solve multistep percent problems.
2) Homework: CS Inv 3 Day 3: CS 3.1 Percents Complete p. 9 and correct with the EDpuzzle
3) Warm Up (packet p. 6):
Determine whether two quantities are in a proportional relationship in equations, tables, and graphs (we will summarize the big ideas as a class)

2. (unit rate – slope – constant of proportionality)
(bottom pg. 6)
As x goes up by 1,
y goes up by ___
(unit rate – slope – constant of proportionality)
Straight line
Goes through origin (0,0)
Must be in the form: y = kx
Constant of proportionality
(unit rate or slope) is k
1) Equivalent ratios ( 1 2 = 2 4 = 3 6 )
2) As x goes up by 1, y goes up by ___ (unit rate - slope – constant of proportionality)
3) (0,0) is in the table (or can be added based on the pattern)

3. Must be in the form: y = kx
Constant of proportionality (unit rate) is k
Equivalent ratios ( 1 2 = 2 4 = 3 6 )
As x goes up by 1, y goes up by ___ (unit rate – constant of proportionality)
(0,0) is in the table (or can be added based on the pattern)

4. Must be in the form: y = kx
Constant of proportionality
(unit rate) is k
Equivalent ratios ( 1 2 = 2 4 = 3 6 )
As x goes up by 1, y goes up by ___ (unit rate – constant of proportionality)
(0,0) is in the table (or can be added based on the pattern)
As x goes up by 1,
y goes up by ___
(unit rate – constant of proportionality)
Straight line
Goes through origin (0,0)

8. S = $22, 550 Yes! Carla ‘s method will work.
If the buying price = 100%, then the selling price = 10% %.
$22, 550

9. 4.
Yes, Huan is also correct. He found 10% of the buying price, which would be the markup..
After he finds M he needs to add M to the buying price to find the selling price.
$22,550
$2050

10. $2050
$512.50
100 25
$22,550
$2050
$512.50

11. The customer’s spending limit is 105% of the maximum selling price.
6. Challenge:
The customer’s spending limit is 105% of the maximum selling price.
Additional Time:
- Start homework on page 8 (complete and then correct with Zaption)

12. CS 3.1: Proportions with Percents
Did I Reach my Learning Target? I can use proportional relationships to solve multistep percent problems.
Homework: CS Inv 3 Day 2: CS 3.1 Percents Complete p. 9 and correct with the EDpuzzle