Sorry this was for math which of the following terms best describes a condition in which a quantity decrease at a rate that is proportional to the current value of the quantity a. positive slopeb. negative slopec. exponential decayd. exponential growth

Option

c

Explanation:

Given that the quantity decreases at a rate that is proportional to the current value of the quantity.

This can be expressed as

rate of change of y = derivative of y

=y'=-ky

where k is the constant of proportionality

This differential equation is linear and can be solved by separation of variables

Integrate both sides

Rise to power e

where A=e^C

Hence this is exponential decay

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year