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?

Question

Mathematics

Guest

12 October, 23:38

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?

+3

Answers (1)

Know the Answer?

Krista Flynn · 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.