SpatialMaths.com
  • Home
    • Junior Cycle Mock survey 2020
    • Spatial Quiz 2
  • Resources
    • Coordinate Geometry >
      • Coordinate plane
      • Midpoint
      • Distance
      • Slope
      • Lines
  • About & Contact
    • Research
  • Lesson Planning Tool

February 12th, 2015

2/12/2015

4 Comments

 
Continued with 9.2 looking at ration inequalities.

HW: Look at Video examples in 9.3 and answer questions from Ex.9.3
Picture
4 Comments
confused
2/12/2015 08:20:27 am

sir i cannot grasp how you are getting the points to plot on the graph. yes i understand you sub in instead of x , you sub a number in and i understand the first one is always zero but after that im lost.

Reply
Mr R
2/12/2015 08:46:51 am

To graph a line you need to know any two points. If you have an equation of the line you use it to get get points. You do this by either subbing in an x value to get a corresponding y values; or sub in a y value to get the corresponding x value. You can sub in any number you wish. It is usually easiest to sub in 0 for x and get the point where the line crosses the y axis, and then 0 for y and find where it crosses the x axis.

Look at the video linked here:
http://www.youtube.com/watch?v=mxBoni8N70Y

Reply
Student
2/12/2015 10:14:51 am

Any khan academy links for these I'm still struggling after using the book and these videos?

Reply
Mr R
2/22/2015 11:05:12 am

The Khan Academy Videos in this area are poor quality. Try this video https://www.youtube.com/watch?v=BXWzNp-4ilA

Reply



Leave a Reply.

    Archives

    June 2015
    May 2015
    April 2015
    March 2015
    February 2015
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014
    August 2014

    RSS Feed

    Author

    Mr Roche

    Categories

    All

Powered by Create your own unique website with customizable templates.