A pet store has three fish tanks, each holding a different volume of water and a different number of fish. Tank AAA holds 40\text{ L}40 L40, start text, space, L, end text and 555 fish. Tank BBB holds 100\text{ L}100 L100, start text, space, L, end text and 121212 fish. Tank CCC holds 180\text{ L}180 L180, start text, space, L, end text and 232323 fish.
Order the tanks by volume per fish from least to greatest.

The equation of curve is .

Step-by-step explanation:

The exponential growth function is represented by the expression described below:

(1)

Where:

- Independent variable.

- Dependent variable.

- Initial value of .

- Base.

By deriving (1), we obtain an expression for the slope of the curve:

(2)

If we know that , and , then we have the following system of equations:

(3)

(4)

By (3) in (4):

Therefore, the equation of curve is .