find 2 exponential functions with asymptote of y=80 , with points (0,176) (1,169) (3,156) (5,146) (20,101) (30,90) (60,81).one should have the base of "e"

Answer 1

I cannot find a function of the form

80 + a*e^(-kx)

which fits more than two of the points, since when x=0, you have

80+a=176, so a=96

and when x=1 you have

80+96e^-k = 169
e^-k = 89/96
k = ln(96/89) = 0.07571

80+96e^(-0.0757x) does not fit any of the other points.