The table below shows the outputs y for different inputs x:

Input

(x) 1 1 3 3

Output

(y) 4 2 12 6

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 paddleboat for x hours is shown below:

f (x) = 20 + 10x

What is the value of f (120), and what does f (120) represent?

Question

Jay

Mathematics

10 November, 12:07

The table below shows the outputs y for different inputs x:

Input

(x) 1 1 3 3

Output

(y) 4 2 12 6

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 paddleboat for x hours is shown below:

f (x) = 20 + 10x

What is the value of f (120), and what does f (120) represent?

+2

Answers (1)

Know the Answer?

Charlize Walls · Answer 1

Part A: The table does not represent y as a function of x. We can not input 1 and get 4 and 2 as outputs (or input 3 and get 12 and 6 as outputs).

Part B : f (120) is a cost for renting a peddleboat for 120 hours;

f (120) = 20 + 10 * 120 = 20 + 1,200 = 1,220.