Exponential Decay
hour Number of Bacteria
250
62.5
3.91
10
0.97
The population change of bacteria in a pond is shown in the table.
Which graph shows a rate of change that is similar to the rate of change of the bacteria?

c. Exponential decay with the function

Step-by-step explanation:

#We plot our values in Excel. The plot output is an exponential decay graph.

Take any two values from our data to determine the k decay rate:

Hence, the function for exponential decay is given as:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.