Algebra 2
Name ________________________________
Linear Regression Worksheet #2
Period ________ Date ___________________
Using a graphing calculator, determine an equation for the line of best fit for each set of data.
A.
CITY
Lagos, Nigeria
San Juan, Puerto Rico
Calcutta, India
Tokyo, Japan
Rome, Italy
Quebec City, Canada
London, England
Copenhagen, Denmark
Moscow, Russia
NORTH LATITIUDE
6
18
26
35
42
47
52
56
56
JAN. MEAN TEMP. (F°)
74
67
55
29
39
2
35
29
9
1. Equation: __________________________________________________________________
2. Correlation coefficient: ________________________________________________________
3. Is this a strong or weak correlation? Explain. ______________________________________
4. Sketch the scatter plot of the data:
5. What does x represent in the equation? ___________________________________________
6. What does y represent in the equation? ___________________________________________
7. If a city has North latitude of 45°, determine the January mean low temperature using your
equation. ___________________________________________________________________
B.
FAST FOOD ITEM
Burger King Whopper
McDonald’s Big Mac
Wendy’s Big Classic
Arby’s Roast Beef
Hardee’s Roast Beef
Roy Roger’s Roast Beef
Burger King Whaler
McDonald’s Filet-O-Fish
Arby’s Chicken Breast Sandwich
Burger King chicken Tender
Church’s Fried Chicken
Hardee’s Chicken Filet Sandwich
Kentucky Fried Chicken (2 pieces)
Kentucky Chicken Nuggets
McDonald’s Chicken Nuggets
Roy Roger’s Chicken (2 pieces)
Wendy’s Chicken Filet Sandwich
CALORIES
584
572
500
365
338
335
478
415
567
223
487
431
460
286
286
519
479
GRAMS OF FAT
33
34
28
19
17
11
26
23
32
12
35
20
31
17
18
35
24
1. Equation: __________________________________________________________________
2. Correlation coefficient: ________________________________________________________
3. Is this a strong or weak correlation? Explain. ______________________________________
4. Sketch the scatter plot of the data:
5. What does x represent in the equation? ___________________________________________
6. What does y represent in the equation? ___________________________________________
7. If Bonin’s Big Burger contains 38g of fat, determine its calories. (Be careful!) _____________
C.
YEAR AFTER 1900
AIDS CASES
90
41,616
91
45,524
92
47,106
93
103,228
94
426,978
95
513,486
96
562,166
97
641,086
1. Equation: __________________________________________________________________
2. Find the number of aids cases in 2003. ___________________________________________
3. What factor(s) does your equation not take into account? ____________________________
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