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Prices at Target and Whole Foods
The price (in dollars) is given for some foods at Target and at Whole Foods. Assume the price at Target is the predictor.
(Source: StatCrunch: organic food price comparison fall 2011. Owner: kerrypaulson)
Food
Target
Whole
bananas/1 lb
0.79
0.99
grape tomato
4.49
3.99
russet potato
4.99
red potato
1.56
2.00
yellow onion
4.94
1.99
red tomato
kiwi each
0.69
green grapes
2.50
3.69
red grapes
2.99
raspberries/.5 lb
3.09
strawberries/1 lb
3.04
6.99
gala apples
1.50
2.49
romaine lettuce
3.29
3.50
cauliflower
broccoli
celery/1 lb
2.19
celery hearts
2.29
green onion
baby carrots/2 lb
baby carrots/1 lb
1.64
stick carrots
1.90
romaine/5 oz
baby spring mix
herb salad
4.19
spinach
green pepper
1.89
3.49
cucumber
2.04
can black bean
1.79
Cascadian cereal
nature crackers
3.39
a. Make a graph and report whether the trend is linear. If the trend is not linear, comment on what it shows, and do not go on to subsequent parts.
b. If the graph is linear, find the equation of the best-fit line, and put the line into the graph.
c. Interpret the slope in context.
d. Either interpret the intercept or explain why it is not appropriate to do so.
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