Functions can be used to model real life situations.
The hose is 3.2 feet above the ground, at a horizontal distance of 4 fee
The function is given as:

At a horizontal distance of 4 feet, the value of x is 4
i.e. 
Substitute 4 for x in f(x).
So, we have:

Evaluate the exponent

Open both brackets

Add -4.8 and 8

Hence, the hose is 3.2 feet above the ground
Read more about functions at:
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Answer:
h
Step-by-step explanation:
h
Pikachu is right.
Undetermined Coefficients (that we learn here) only work when f(x) is a polynomial, exponential, sine, cosine, or a linear combination of those.
And,
As we can see that the equation given is a Polynomial,
So, Pikachu is right.
Learn more about Polynomial:
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You should use a bar graph because that would work better
$61 x 3= $183
$183 x .08225= 15.11
$183 + 15.11= $198.11