The best prediction for the number of pages in a chapter that takes 18 minutes to read is 21 pages.
A function is such that each element of x has one and only one element of y.
The function is given as:
y = 0.86x – 0.09
We have to find how many pages we can read in 18 minutes. Therefore y = 18:
18 = 0.86x - 0.09
⇒ 18.09 = 0.86x
⇒ x = 18.09/0.86
⇒ x = 21.03 ≈ 21 pages
The number of pages that can be covered in 18 minutes is 21 pages.
Therefore, the best prediction for the number of pages in a chapter that takes 18 minutes to read is 21 pages. The correct answer is option D.
Learn more about functions here: https://brainly.com/question/10439235
#SPJ2