Extra Credit.

The results from the two calculations are shown in Table 1. The first function is y1=4x^3+5 and the second function is y2=7x^3+100.

The first column contains some values for the independent variable x. The domain of these values: -25 to 25 were chosen randomly, first. I just wanted to make sure that when the graph is made the important parts would show. Some examples of the important parts are: the vertex, the roots, the local minimum, the local maximum, etc. The scale is set to 5.

These x-values were substituted into the function y1, and the results are displayed in the second column. Since y1 is a third degree polynomial or cubic function, the y-values first increase as the x-values increase from negative numbers to positive numbers. There is no vertex because this is a third degree polynomial. It is hard to tell the coordinates of the local minimum and maximum without a graph.

The y-values for y2=7x^3+100 are shown in the third column of Table 1. The y-values also increase as the x-values increase from negative to positive numbers.