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Unformatted text preview: we don’t know ahead of time just what the equation is or any of the
ways to quickly sketch the graph. In these cases we will need to recall that the graph is simply all
the points that satisfy the equation. So, all we can do is plot points. We will pick values of x,
compute y from the equation and then plot the ordered pair given by these two values.
How, do we determine which values of x to choose? Unfortunately, the answer there is we guess.
We pick some values and see what we get for a graph. If it looks like we’ve got a pretty good
sketch we stop. If not we pick some more. Knowing the values of x to choose is really
something that we can only get with experience and some knowledge of what the graph of the
equation will probably look like. Hopefully, by the end of this course you will have gained some
of this knowledge.
© 2007 Paul Dawkins 154 http://tutorial.math.lamar.edu/terms.aspx College Algebra Let’s take a quick look at a graph. Example 1 Sketch the graph of y = ( x - 1) - 4 .
Now, this is a parabola...
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This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.
- Spring '12