IN MATH: 1. n. a number line. 2. usually the number line which is vertical and perpendicular to the x-axis in a Cartesian coordinate system; the line x = 0. EX. The point (0,-3) is on the y-axis and 3 units lower than 0.

 See: A Graph is A Portrait - an essay on the concepts of graph GRAPHITI - introductory coordinate geometry, point generation, distance, functions Point-Plotting Animation - see step-by-step how to create a graph Slope in Sound & Picture Graphing with Manipulatives & Exploring Functions - ANIMATIONS!!!!, translations, reflection!   - Graphing w/Manipulative, Exploring Functions TOOLS   - Algebra Notes What's a Function? - Index on topics like "How Functions Are Composed or Created", "Polynomial & Rational Functions" "Finally ... Functions" -- an introduction to functions as a direct consequence of operations Functions & Operations -- a page that computes & illustrate how functions work - Function and Relation Library - Many functions w/their features & graphs Graphing Vocabulary Function Vocabulary

IN ENGLISH: 1. as defined above.

APPLICATION: See list 230.

1. At what point does the x-axis intersect the y-axis?

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