A function models the growth of a sample starting with 40 bacteria with the ability to double every two hours. Which graph models the function?

Which of the following best describes the graph below? a. it is a function, but it is not one-to-one. b. it is a one-to-one function. c. it is not a function. d. it is a many-to-one function.

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

What is the definition of exponential decay?