What is the decay factor of the exponential function represented by the table (d. 6 is not the answer) pls

Each morning papa notes the birds feeding on his bird feeder. so far this month he has see. 59 blue jays, 68 black crows, 12 red robin's and 1 cardinal. what is the probability of a blue jay being the next bird papa sees

Can someone me with this problem . show your work .

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)