A parabola can be drawn given a focus of (4,-7) and a directrix of y=5. Write the equation of the parabola in any form

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=