6. (MGSE9-12.F. LE.5) An element is decaying according to the model given by y(x) = +7 where x is measured in days and y(x) is measured in grams. Explain the correct meaning of the
7 in this situation.
A. Initially, seven grams of the element were present at x = days.
B. The element is decaying at a rate of 7 grams/day.
C. After 7 days, there is 1/3 of the element remaining in grams.
D. As the days continue to increase, the amount of element left approaches 7 grams.

Number 6 in pic