Question

why have all the rates of change in this assignment been negative? explain.

Explanation:

A negative rate of change implies that the dependent - variable decreases as the independent - variable increases. It could mean that the quantity being measured (e.g., a function's value, a physical quantity) is declining over time or with respect to another variable. For example, if we are looking at the decline in the number of items in stock over days, the rate of change of stock quantity with respect to days would be negative.

Answer:

A negative rate of change indicates that the quantity under consideration is decreasing as the relevant independent variable (such as time, another variable in a function) increases.