what is the function rule for (1,2), (2,16), (3,54), (4,128), (5,250)?

Expert Answers

An illustration of the letter 'A' in a speech bubbles

To find the function rule, it is important to find any invariant values for each x-value.  In this case, we see that if we cube each x-value and then multiply by 2, we get the corresponding y-value.  That is:

`2times (1)^3=2`

`2 times(2)^3=2(8)=16`




This means the function rule is `y=2x^3` .

Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial