Assignment #1
Nicole Mosteller EMAT 6680



Part 2: Investigate the following relation for values of a and b equal to 1.


During my investigation, I noticed that the relation above made a dramatic change when the values of a and b are both equal to 1. This dramatic change in the graph prompted me to investigate other values of a = b.

Figure 1: a and b equal to 1.

In both Figure 1 and Figure 2, the graphs resemble the composition of an ellipse and the line y=x. Notice as the value of a and b become larger, the ellipse grows larger proportionally.

Figure 2: a and b equal to 3.


Why do we see an ellipse and a straight line?

Question #2 of Investigation #1 addresses the composition of two relation equations. Within this question, we notice that when two relation equations are multiplied (i.e., f(x)*g(x)), the resulting relation equation's graph is the two original relations. Since our graph has both an ellipse and a straight line, the two original equations must be of an ellipse and a straight line. Now the question becomes how do we transform the equation

so that we have the equations for both an ellipse and a straight line? To simplify matters, remember Below are the steps that were taken to transform the equation (Shout-out to Jadonna Brewton - Thanks!)


Now we have the multiplication of two relation equations.

produces the linear part of the relation, and

produces the elliptical part of the relation.


Now that we have seen what occurs to the relation equation

when a and b are greater than or equal to 1, my next investigations demonstrate the changes in the graphs that occur for other values of a and b.


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