Sami consulted a dietitian regarding weight loss and was given a nutrition plan to follow. the dietitian informed sami, if she follows the plan, her results should be in alignment with the following linear model. in this model, x represents the number of weeks on the plan, and y represents sami's weight (in pounds). interpret the y-intercept. y = 342 - 2.2x

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?