For every chapter of a book, there is an average of 10 pages.
The slope of the linear model represents the average number of pages that correspond to each additional chapter in the book. In this case, the slope is 10, meaning that for every additional chapter, there are on average 10 more pages.
The y-intercept of the linear model represents the starting point of the relationship between chapters and pages. In this case, the y-intercept is 0, meaning that when there are 0 chapters (at the beginning of the book), there are also 0 pages.