Gráficos de retas

Seis unidades sobre o plano cartesiano e as retas: marcar pares ordenados, fazer o gráfico de uma equação a partir de uma tabela ou dos pontos de corte com os eixos, inclinação como variação vertical sobre variação horizontal, y = mx + b, achar a equação de uma reta e resolver duas equações vendo onde as retas se cruzam. Cada unidade tem um laboratório de gráficos para arrastar e testar.

Progresso

Fontes deste curso (6)

OpenStax, Elementary Algebra 2e , chapter 4 Graphs: 4.1 Use the Rectangular Coordinate System (quadrants numbered from the upper right, counterclockwise; ordered pairs: openstax.org/books/elementary-algebra-2e/pages/4-1-use-the-rectangular-coordinate-system)
4.2 Graph Linear Equations in Two Variables, 4.3 Graph with Intercepts, 4.4 Understand Slope of a Line (m = rise/run, horizontal 0, vertical undefined, roof pitch, road grade as a percent, wheelchair ramp 1-inch rise per 12-inch run: .../pages/4-4-understand-slope-of-a-line)
4.5 Use the Slope-Intercept Form (x + 2y = 6, F = 9/5 C + 32, parallel lines same slope, perpendicular slopes multiply to −1: .../pages/4-5-use-the-slope-intercept-form-of-an-equation-of-a-line)
4.6 Find the Equation of a Line (point-slope form: .../pages/4-6-find-the-equation-of-a-line)
5.1 Solve Systems of Equations by Graphing (3x − y = 7, x − 2y = 4 and (2, −1); consistent, inconsistent, independent, dependent, coincident lines: .../pages/5-1-solve-systems-of-equations-by-graphing)
MacTutor, University of St Andrews, René Descartes biography (La Géométrie, published at Leiden in 1637 as an appendix to the Discours de la méthode: mathshistory.st-andrews.ac.uk/Biographies/Descartes)

Data de verificação: 2026-10-17