Which relationship shows an inverse variation?
choices:
x = 1, 2, 3, 4
y = 3, 6, 9, 12

x = 1, 2, 3, 4
y = 60, 30, 20, 15

x = 1, 2, 3, 4
y = 15, 13, 11, 9

x = 1, 2, 3, 4
y = 6, 11, 20, 35

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?