Acompany 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 of each commercial. the cost can be modeled by the equation y = 500 + 50x 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 the one-time campaign fee

c. 50; it represents the per-second fee of air time

d. 50; it represents the one-time campaign fee