Which set of ordered pairs does not represent a function? A. {(1, 2), (2, 3), (3, 4), (4, 5)}

B. {(2, 5), (3, 5), (4, 5), (6, 5)}

C. {(5, 4), (4, 3), (3, 2), (2, 1)}

D. {(2, 6), (3, 4), (-1, 2), (3, 7)}

Please answer quickly this is for a test!!!

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%

At the electronics store you have a coupon for 20% off up to 2 cds you buy for cds with the original cost of $10.99 each the sales tax is 5% what is the total cost of your purchase