A surf instructor has an initial fee of $12 and charges $8 per hour for lessons. Explain how to determine what the y-intercept is and where it would be located on the graph.

The y-intercept in slope-intercept form is b, which is represented by 12. The y-intercept is the initial value, and is found on the graph as the point (0, 12) where the line crosses the y-axis.