Find the least squares estimate of alpha and beta of the mechanistic growth

model: Y=alpha*(1-beta*e^-x) using the following dataset.

Y 1 1.1 1.39 1.55 1.63 1.86 1.98

X 0 0.1 0.5 0.8 1 2 4

What the question want us to do? What is the answer look like?(We are using excel to do the regression analysis)

Curve fitting? Or just directly do the simple regression by the dataset?

Thank you so much.