This is a blog for my second semester pre-calculus 30s students. Have a blast!

Wednesday, April 05, 2006

Post: Graphing Inequalities

Equations without an equal sign is an inequality...

An inequality only has a > (greater than), < [less than], [greater than or equal to], and ≤ [less than or equal to] sign...

a graph of an inequality does NOT appear as a line...

if it has the greater than sign.. it means that all the values above the line is your solution...

if it is less than.. all values at the bottom of the line is your solution..


REMINDER!!!: The solutions for these do not include the points of your line... so the line you graph should be a broken line


if it is greater than or equal to, or less than or equal to same rules apply but the line of the graph becomes solid

AND- Intersection

OR- Union Intersection...

it is where the two graphs both have the same points for their solutions Union- all possible solutions for both graphs

HOW TO SOLVE USING YOUR TI-38:

Step 1: Enter the two points...
/Y1= x
/Y2= -x

Step 2: Put your cursor in the first character(** the slash thing) and press enter...
/ <-- I mean this one... it should look like a right triangle... one with the right triangle below means less than... one with the right triangle above means greater than... EX: y≤ x AND y≤ -x



Gray part and the Black part is the solutions for y= x and y= -x or the UNION...

The Black part is the INTERSECTION...

For QuAdRaTiC FuNcTiOnS...

EX:

y≤ x2


I am not quite sure about this since i didn't understand it that well...

So the next scribe is.........

hmmm....

???..

Fevie!!!..Fevie!!!..Fevie!!!..Fevie!!!..Fevie!!!..Fevie!!!..Fevie!!!..

3 Comments:

Blogger Mr. Malandrakis said...

Miles, this is an amazing post. Excellent job, and now I've just come to expect these kinds of posts from you. Keep up the fantastic work.

8:08 AM

 
Anonymous Anonymous said...

good job Miles

4:30 PM

 
Blogger miles_23 said...

well... i found a minor error in my post... the first figure is not suppose to have a solid line on it... it was suppose to be dotted or there should be no black line on there..

hehehe...

12:00 AM

 

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