The line of best fit for a data set is \(y = 2x + 10\), where \(x\) is the number of weeks and \(y\) is the total number of books read. According to the model, how many books will have been read after 15 weeks?

The equation \(y = 3x + 20\) models the total cost \(y\), in dollars, of ordering \(x\) custom T-shirts from a printing company. What does the slope of 3 represent in this context?

A school surveyed 100 students about their favorite sport. The results are shown below. \[\begin{array}{|c|c|c|c|} \hline & \textbf{Basketball} & \textbf{Soccer} & \textbf{Total} \\ \hline \textbf{Boys} & 30 & 20 & 50 \\ \textbf{Girls} & 15 & 35 & 50 \\ \hline \textbf{Total} & 45 & 55 & 100 \\ \hline \end{array}\] What fraction of all students surveyed prefer soccer?

A mechanic uses the equation \(y = 5x + 25\) to estimate the total repair cost \(y\), in dollars, for a job that takes \(x\) hours of labor. What does the number 25 represent in this context?