A company is paying a local television station to run its commercials. The cost for running commercials is a one-time campaign fee and also a per second fee for the air time The cost can be modeled by the equation y = 500+ Sox, where x is seconds.
What is the y-intercept, and what does it represent

A.500 it represents the per second fee of air time
B.500 it represents one time camping fee
C.50 it represents the per second fee of air time
D.50 it represents one time camping fee