Answer
See below
Work Step by Step
From part a, we have the scatter plot of $(x, \ln y)$.
We can see that the data doesn't fall neatly onto a single line.
Use the form: $\ln y-y_1=m(\ln x-x_1)$
Take two points: $(55,4);(20,2.485)$
Find the slope: $m=\frac{4-2.485}{55-20}\approx 0.043$
Obtain: $\ln y-4=0.043(\ln x-55)\\\ln y=0.043\ln x+1.635\\\ln y=\ln x^{0.043+1.635}\\y=e^{1.635}(e^{0.043})^x\\y=5.13(1.044)^x$
