Which is the equation of the porabola with focus of (0,5) and directrix x= -5?

a) x^2 = -5y
b) x^2 = 5y
c)x^2 = 10y
d)x^2 = 20y

and you!

In 2000 the average price of a football ticket was $48.28. during the next 4 years, the proce increased an average of 6% each year.a) write a model giving the average price (p), in dollars, of a ticket (t) in years after 2000.b) graph the model. estimate the year when the average ticket price was about $60