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Answered

The table below shows the cube roots of different numbers

Number(x) 8 27 64 125

Cube root(y) 2 3 4 5


Part A: Does the table represent y as a function of x? Justify your answer.

Part B: The total cost f(x), in dollars, for renting a bike for x hours is shown below:


f(x) = 10 + 20x


What is the value of f(100), and what does f(100) represent?

Verified Answer :

HomertheGenius

Part A :  Yes, it represents y as a function of x. There are not 2 different y values for the same x value.
f ( x ) = ∛ x   ( or : y = ∛x  )
Part B : f ( x ) = 10 + 20 x
f ( 100 ) = 10 + 20 · 100 = 10 + 2,000 = 2,010
f ( 100 ) represents the total cost for renting a bike for 100 hours.

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