Plot Points

In order to determine in which quadrant the point lies, we must remember the order of the quadrants. The first quadrant is that where x and y are both positive, to the upper right of the origin. To move sequentially to the final quadrant, we go counterclockwise from the first quadrant, which means the second is where x is negative and y is positive, the third is where x and y are both negative, and the fourth is where x is positive and y is negative. We can see from our point (-3,-8) that x and y are both negative, which means the point lies in the third quadrant.

When looking at the graph, it is clear that when , has a value less than . If we were to plug in the value of , our equation would come out as such:

Therefore, at , we get a , providing the coordinate .

Use the distance formula to find the length of .

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Since the length of is that of the diameter, the radius of the circle is .

Thus, the area of the circle is

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If we were to plug in the coordinate into the function, we will find that it does not equate properly:

Since these values do not equate properly when plugged into the function, we now know that does not fit on the provided graph.

When looking at the graph, it is clear that when , has a value greater than . When we plug in both and values into the function, it is clear that these values do not work for the function:

If we are to plug into our function, the values would not work and both sides of the equation would not be equal:

Therefore, we know that these coordinates do not lie on the graph of the function.