Cool math fractal

math image

math image

pre-algebra help lessonsalgebra help lessonsprecalculus / calculus help lessonsmath anxiety survival guidegeometry math artmath and jigsaw puzzlesCoolmath booksother math stuff
math help lessonsmath practice problemsmath gamesmath dictionarygeometry trigonometry reference area
teacher's areaparent's areaCoolmath 4 kidsSpike's Game ZoneFinance FREAKTotally Stressed OutScience Monster
Coolmath Algebra
Graphing Rational Functions Lesson 2 - Intercepts (page 1 of 2)
---- This algebra lesson explains how to find the x and y intercepts when you are graphing rational functions.

math image
Now available: Coolmath Algebra books! Part 1, Part 2 and Part 3 covering the Algebra you need from Algebra 1 through Precalculus Algebra (Beginning Algebra through College Algebra)

other Coolmath Books: Coolmath Precalculus Review (the math you really need to survive Calculus 1) and Math Survival Guide (How to conquer math and deal with math anxiety)
line
Graphing Calculator Scientific Calculator << a new window will open for these
line
These are easy!

Y-INTERCEPTS:  Where the graph crosses the y-axis.

OK, think about it...  When you are on the y-axis, what is your x value?

graph of a point on the y-axis ... ( 0 , 2 ) ... the x value is 0

 The x value is 0.

So, to find the y-intercept...  set x = 0!

That's the same as finding f(0).

Check it out:

f ( x ) = ( x^2 - x - 6 ) / ( x^2 - 1 ) f ( 0 ) = ( ( 0 )^2 - 0 - 6 ) / ( ( 0 )^2 - 1 ) = 6

So, the y-intercept for this guy is the point

( 0 , 6 )

TRY IT!:

Find the y-intercept of f ( x ) = ( x - 3 ) / ( x^2 - 3x - 10 )

 Continued on the next page

 The printing and distribution and/or downloading of these lessons is strictly prohibited.
line
Graphing Calculator Scientific Calculator << a new window will open for these
line

.....:::::::::::::::  HELP SUPPORT COOLMATH  :::::::::::::::.....
:::::::  link to us   :::::::   advertise with us  :::::::  why we have ads  :::::::

Thanks for visiting Coolmath.com
© 1997-2010 Coolmath.com, Inc.