Math Dictionary / Y-Intercept
Y-Intercept
The y-intercept is the point where a graph crosses the y-axis.
AlgebraGrade 8Algebra 1GEDSATACT
What it means
In y = mx + b, the y-intercept is b.
Also called: vertical intercept
Examples
| In y = 2x + 5, the y-intercept is 5 |
| A graph crosses the y-axis at x = 0 |
| The point can be written as (0, b) |
Common mistake
The y-intercept is not always where the graph crosses the x-axis.
Try one
Question: What is the y-intercept of y = -3x + 8?
Show answer
The y-intercept is 8.