math assignment

Question

Write an exponential function in the form y=abx that goes through points (0,2) and (3,128)



Answer 1

y=ab^x=2=ab^0=a(1)=a

a=2

y=2b^x

128=2(b^3)

b^3= 128/2= 64

b =4

y=2(4^x)