Mariam signed up for a streaming music service where there's a fixed cost for monthly membership and a cost per song downloaded. Her total cost is given by the linear graph below. What does the y-intercept in the graph represent?
The cost to download 100 songs.
The base cost of the streaming service per month.
How much the streaming service charges per downloaded song.
A total cost of 8.24 per month when one song is downloaded.