Example

Finding the Equation of a Line with Slope 7-7 and y-Intercept (0,1)(0, -1)

To find the equation of a line when its slope and y-intercept are given, substitute the values directly into the slope-intercept form y=mx+by = mx + b.

Given: slope m=7m = -7 and y-intercept (0,1)(0, -1), so b=1b = -1.

Step 1 — Identify the slope: m=7m = -7.

Step 2 — Identify the y-intercept: The y-intercept is (0,1)(0, -1), so b=1b = -1.

Step 3 — Substitute into y=mx+by = mx + b:

y=7x+(1)y = -7x + (-1)

y=7x1y = -7x - 1

The equation of the line is y=7x1y = -7x - 1. This approach is the most direct way to write a line's equation — when both the slope and y-intercept are already known, no further algebra is needed beyond plugging the values into the formula and simplifying.

0

1

Updated 2026-04-21

Contributors are:

Who are from:

Tags

OpenStax

Elementary Algebra @ OpenStax

Ch.4 Graphs - Elementary Algebra @ OpenStax

Algebra

Math

Prealgebra

Related
Learn After