2. Write an inequality and solve. The setup fee for a photo book is \( \$ 15 \) . The paper s an additional charge of \( \$ 0.17 \) per page. What is he greatest number of pages that a book can ave if the total bill is to be less than \( \$ 40 \) ?
\(15+ 0.17x< 40\)
A linear function that models data is described below. Find the slope of the model. Then describe what this means in terms of the rate of change of the dependent variable per unit change in the independent variable. The linear function \( f ( x ) = - 0.41 x + 28.6 \) models the percentage of adults in a country who smoked cigarettes, \( f ( x ) \) , \( x \) years after \( 1997 \) .
The slope is \( \square \) . (Type an integer or a decimal.)