Data Plotting and Fitting

Call for nonlinear fitting

Make sure that there is no predefined values for our variables

Define the function using the values from the previous command

If x_ is not working try x in cv[x_]

We use the Show command to superimpose figures

Problem 3. - Consider the following data and find a fit and plot the data and the best fit function
data2 ={{220,.642},{250,.759},{275,.861},{300,.952},{325,1.025},{350,
      1.085},{380,1.142},{400,1.177}}