8th Grade Graphing Equations 8.5

The y-intercept is the point where a line crosses the y-axis, represented as (0, y).

Slope represents the steepness of a line, indicating how much the y-value changes for a change in the x-value.

Slope (m) = (y2 - y1) / (x2 - x1).

The slope of a vertical line is undefined.

The slope of a horizontal line is 0.

For every 2 units you move right (positive x-direction), you move up 1 unit (positive y-direction).

The slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

A negative slope indicates that the line descends from left to right.

A positive slope indicates that the line ascends from left to right.

Two lines are parallel if they have the same slope.