At the end of a snow storm, Abigail saw there was a lot of snow on her front lawn. The temperature increased and the snow began to melt at a steady rate. Let SS represent the depth of snow on Abigail's lawn, in inches, tt hours after the snow stopped falling. A graph of SS is shown below. Write an equation for SS then state the yy-intercept of the graph and determine its interpretation in the context of the problem.