7. When graphed, a data set clearly and tightly forms the shape of an exponential decay function. Which of the following best describes the relationship?
A. a weak positive exponential relationship
B. a strong negative exponential relationship
C. a weak negative exponential relationship
D. a strong positive exponential relationship
10. Tim calculates the number of calories he burns while working out for a certain amount of time. He came up with the equation below, where C is the number of calories burned and t is the amount of time, in minutes, he worked out. If Tim works out for 45 minutes, how many calories should he burn? c=7t+118
A. 7
B. 118
C. 315
D. 433
11. A meteorologist has collected the data about the diameter of hailstones in inches, d, and the speed at which they fall in miles per hour, s. The resulting line of best fit for the data set is below. What is the predicted speed for a hailstone with a diameter of 10 inches? Round to the nearest whole number.
s=30d+8
A. 30
B. 48
C. 308
D. 300
7. B. a strong negative exponential relationship
10. D. 433
11. B. 48