Question

A biologist is studying a form of bacteria that grow by 20% every hour. The graph

below models the growth of the bacteria. The y-intercept is (0, 125) what does that
represent in the context of the problem?

Answer 1

216

Explanation:

125(1+20/100)^3= 216

Answer 2

see the explanation

Explanation:

Let

y ----> the number of bacteria

x ----> the number of hours

we know that

The y-intercept is the value of y when the value of x is equal to zero

In the context of this problem

The y-intercept is the initial number of bacteria at the begin of the study

The y-intercept is the point (0,125)

therefore

The value of y=125 is the initial number of bacteria at the begin of the study (For x=0)