Examples

1. You are asked to define a function that computes this error approximation formula. $$e(x)=1-\frac{1}{{(1+0.278393x+0.230389x^2+0.000972x^3+0.078108x^4)}^4}$$

   Valid names for the function are e, E, formula, computation, value, my_function, fun, etc. But, none of these are good names for this function. It is important to choose a name that is descriptive and will help you remember what the function does. Thus, a better names for this function would be errorApproximationFunction, errorApproximation, error_approximation, Error_Approximation or even just errApprox.

   Consistent capitalization is also necessary to make it easier to remember how to call your functions.