Activity (Process)

Choosing the Form for Writing an Equation of a Line

The most efficient way to write the equation of a line depends on what information is given:

  • Given the slope and the y-intercept, use the slope-intercept form directly: y=mx+by = mx + b.
  • Given the slope and any point on the line, use the point-slope form: yy1=m(xx1)y - y_1 = m(x - x_1).
  • Given two points on the line, first calculate the slope from the two points, then use the point-slope form: yy1=m(xx1)y - y_1 = m(x - x_1).

In every case where the point-slope form is used, the result can be simplified into slope-intercept form afterward. Matching the form to the available information avoids unnecessary steps and makes equation-writing faster.

0

1

Updated 2026-04-23

Contributors are:

Who are from:

Tags

OpenStax

Elementary Algebra @ OpenStax

Algebra

Math

Ch.4 Graphs - Elementary Algebra @ OpenStax

Prealgebra

Intermediate Algebra @ OpenStax

Ch.3 Graphs and Functions - Intermediate Algebra @ OpenStax

Related
Learn After