I need help with a math problem

Question

write an exponential function in the form of y=ab^xthat goes through points (0,9) and (5, 2187)

Answer 1

y = ab^x

9 = a(b)^0 =a

a =9

y = 9b^x

2187=9b^5

b^5 = 2187/9= 243

b = 5th root of 243

b = 3

y=9(3)^x is the exponential equation through the two given points