1. The document compares drink orders from 2010 to 2011 and found decreases in total drinks ordered. Skim milk orders decreased the most while chocolate milk increased the most. 2. By switching from 2% milk to skim milk, students could save about 50 calories per order. Switching from chocolate milk to water could save 140 calories per order. 3. Making these changes could result in losing over 300 pounds in a school year if followed by all students 180 days a year.

1. Difference Between 2011 Order and 2010 Order
CLASS Skim 2% Milk Chocolate Bottled Water
Pre K -1 -5 0 1
KA -3 2 0 0
KB 0 3 5 1
KC 1 1 -1 -1
1A 3 1 0 -1
1B 1 -2 1 0
2A -4 -2 1 0
2B -2 -3 0 1
3A 0 4 2 -3
3B 5 3 -3 1
4A -2 0 0 1
4B -2 3 2 -3
5A 0 -1 -1 1
5B -8 2 4 -1
6A 2 -5 10 -1
6B 3 -3 2 2
7A -2 -4 -1 2
7B -1 1 -8 -1
8A -3 -3 -3 0
8B -2 7 0 1
-15 -1 10 0
2. Drinks orders have decreased in total (loss of 6). Is this a reflection of change in total student population?
Skim milk showed the biggest decrease of 15, 2% a small loss of 1, and chocolate milk the biggest increase of 10. Water held
3. Biggest loss is in 7th grade, where 14 drink orders were lost. Sixth grade had the biggest gain of 10, but is due to increase i
Second grade lost 9, while 3rd grade gained 9.
Percent change is the change divided by the original amount.
Skim milk showed the biggest decrease of 15, 2% a small loss of 1, and chocolate milk the biggest increase of 10. Water held
4.0
Original Order (2010) Change % Change
Skim Milk 73 -15 -0.205479452
2% Milk 109 -1 0.009174312
Chocolate Milk 171 10 0.058479532
Water 31 0 0
5.0
A. Step 1: Figure out how many students ordered 2% white milk this year: 108
If students switched to skim milk, they'd save 50 calories per order or: 50*108
B. Students who order chocolate milk 181
Chocolate milk has 140 calories, so switching to water would save that much per order

2. BONUS
Pounds you would lose by making the changes in 5A and 5B, assuming 180 school days per year
Pounds Lost
5A: 2% white milk to skim milk 277.7142857
5B: chocolate to water 1303.2

3. Sum of Change per Class Sum of Change Per Grade
-5 -5
-1 8
9
0
3 3
0
-5 -9
-4
3 9
6
-1 -1
0
-1 -4
-3
6 10
4
-5 -14
-9
-9 -3
6
dent population?
ggest increase of 10. Water held steady.
gain of 10, but is due to increase in class size.
ggest increase of 10. Water held steady.
5400
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