Identify the relation that is also a function. A. {(5, 4) (5, 1) (5, 3) (0,5)}
B. {(4, 2) (4, -3) (9, 3) (9,-3)}
C. {(1, 0) (2, 3) (3, -1) (1,5)}
D. {(0, -1) (1, -2) (2, -3) (-1, 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?

Finding tbe values of the variables in each kite

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )