Fit an exponential curve in the set of data

I need to fit an exponential model and find its coeffiecient of regression/ (r^2) and predict the lane width at distance 2m in the following data:

Distance,m= [2.4 1.5 2.4 1.8 1.8 2.9 1.2 3 1.2]

Lane width,m= [2.9 2.1 2.3 2.1 1.8 2.7 1.5 2.9 1.5]