2-5: The y-intercept of a Line

Key Concept

The y-intercept of a graph is the y-value at which the graph crosses the y-axis.

Three graphs.

Part 1

Example Graphing Lines to Find y-Intercepts

Graph the equation y = x + 3. What is the y-intercept of the graph of the equation?

Solution

The y-intercept of the graph of the equation is 3.

A graph of the line y = x + 3 slanting upward through (-3, 0) and (0, 3). (0, 3) = y-intercept: 3.


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Table of Contents

Digits, Grade 8, Volume 1, Homework Helper Unit A: Number and Operations Unit B: Proportionality Unit C: Expressions, Equations, and Relationships English/Spanish Glossary Formulas Math Symbols Formulas Measures Properties