This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ork. 0 = ( x + 1) 2 Þ x = -1 Þ ( -1, 0 ) In this case we have a single x-intercept.
Here is a sketch of the graph for this equation. Now, notice that in this case the graph doesn’t actually cross the x-axis at x = -1 . This point is
still called an x-intercept however.
[Return to Problems] We should make one final comment before leaving this section. In the previous set of examples
all the equations were quadratic equations. This was done only because the exhibited the range of
behaviors that we were looking for and we would be able to do the work as well. You should not
walk away from this discussion of intercepts with the idea that they will only occur for quadratic
equations. They can, and do, occur for many different equations. © 2007 Paul Dawkins 158 http://tutorial.math.lamar.edu/terms.aspx College Algebra Lines
Let’s start this section off with a quick mathematical definition of a line. Any equation that can
be written in the form, Ax + By = C where we can’t have both A and B be zero simultaneously is a line. It is okay if one of them is
View Full Document
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