Two Points Determine a Line

Any two distinct points in a plane determine a line, which has an equation determined by the coordinates of the points.



  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


When "grid" is chosen to be "integer", the locator points snap to integer coordinates on the grid. This tends to simplify the coefficients for the equation. When "grid" is chosen to be "open", the coordinates and coefficients in the equations are given to as many as five significant digits.
When "coefficients" is chosen to be "rational", the coefficients in the equation are rounded to a nearby rational value. High school students often have a preference for decimal coefficients over rational ones, even though exact rational ones are usually more useful. Within the visual accuracy of the graphs, the rational coefficients can be considered exact.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Related Curriculum Standards

US Common Core State Standards, Mathematics

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+