Describe the meaning of the y-intercept

y-value at intercept = f(0), the value of the function when x = 0

Step-by-step explanation:

The "y-intercept" of a graph (any graph, not just a straight line) is the y-value obtained when x = 0.  In other words, the y-intercept is the point at which the graph crosses the y-axis (whose equation is x = 0).  Very often the y-intercept represents the initial (beginning) value of functions whose domains include [0, +infinity).