Question

The table below shows the cube roots of different numbers

Answer 1

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.