Question

What's the function notation for this? And which one is the independent and dependent variable?

Answer 1

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.