Precalculus : Plot Points
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Example Question #1 : Plot Points
The point 
II
IV
Lies on an axis
III
I
III
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.
Example Question #2 : Plot Points
Use the distance formula to find the length of 
Since the length of 
Thus, the area of the circle is
Example Question #3 : Plot Points
Which of the following coordinates does NOT fit on the graph of the corresponding function?
When looking at the graph, it is clear that when 
Therefore, at 
Example Question #4 : Plot Points
Which of the following 
When looking at the graph, it is clear that when 
Example Question #5 : Plot Points
Which of the following 
If we are to plug 
Therefore, we know that these coordinates do not lie on the graph of the function.
Example Question #6 : Plot Points
Which of the following 
If we were to plug in the coordinate 
Since these values do not equate properly when plugged into the function, we now know that 
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