Answer: f(x) = 0.30x + 2.50
This is the same as writing y = 0.30x + 2.50
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Explanation:
x = number of pounds
y = f(x) = total cost in dollars
1 pound costs $0.30
x pounds cost 0.30x
This is ignoring the entrance fee
Tacking on the entrance fee leads to a total of y = 0.30x + 2.50
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The independent variable is always x and the dependent variable is always y.
The independent variable (number of pounds) determines what the dependent variable (total cost) will be.
