Keisha is a language arts and civics tutor. She offers tutoring sessions that are hours long. The equation 20h+25 represents her charge in dollars for a Language arts session that is h hours long. For civics, she charges the same one-time fee but a different hourly rate. She charges $124 for a 3-hour civics tutoring session. Write an equation in slope-intercept form that represents the total charge, , of a civics tutoring session that is h hours long, and find the reasonable range of that equation.