Martin has a gift card to a coffee shop. each day he buys the same coffee. the table shows the amount remaining on the gift card on different days.
which equation represents the situation?
martin’s gift card
days 2 4 5 7
amount remaining 24.10 18.20 15.25 9.35
a.
y – 9.35 = −2.95(x – 7)
b.
y – 18.20 = 2.95(x + 4)
c.
y + 15.25 = −2.95(x + 5)
d.
y + 24.10 = 2.95(x – 2)

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?