The graph shows the population of a bacteria in an experiment, measured every hour.
which function represents the population of the bacteria after t hours?
f(t) = 10(1.4)t
f(t) = 10(2.0)t
f(t) = 14(1.4)t
f(t) = 14(2.0)t

Given the graph which shows the population of a bacteria in an experiment, measured every hour.

The graph is a graph of an exponential function.

An exponential function is given by

where: a is the initial value of the function when t = 0,
r is the growth/decay rate, and
t is the time elapsed.

From the graph, the initial size of the population when t = 0 is 10, thus, the value of a in the function is 10.

Also, from the graph, after 2 hours, the popolation of bacteria was 20,
i.e.


Therefore, the function representing the population of the bacteria after t hours is