A little background

Objectives

  • Students know slope is a number that describes the steepness or slant of a line.
  • Students interpret the unit rate as the slope of a graph.
  • Students use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane.
  • Students use the slope formula to compute the slope of a non-vertical line.
  • Students show that the slope of a line joining any two distinct points of the graph of y = mx + b has slope, m.
  • Students transform the standard form of an equation into y = -(a/b)x + (c/b)
  • Students graph equations in the form of y = mx + b using information about slope and y-intercept
  • Students know that if they have two straight lines with the same slope and a common point that the lines are the same.
  • Students prove that any point on the graph of y = mx + b is on a line l and that any point on a line l is a point on the graph of y = mx + b.
  • Students graph linear equations on the coordinate plane.
  • Students know that any non-vertical line is the graph of a linear equation in the form of y = mx + b , where b is a constant.
  • Students write the equation that represents the graph of a line.
  • Students writ e the equation of a line given two points or the slope and a point on the line.
  • Students know the traditional forms of the slope formula and slope-intercept equation.
  • Students know that any constant rate problem can be described by a linear equation in two variables where the slope of the graph is the constant rate.
  • Students compare two different proportional relationships represented by graphs, equations, and tables to determine which has a greater rate of change.
  • Students know that two equations in the form of ax + by = c and a′x + b′y = c′ graph as the same line when a′ / a = b′ / b = c′ / c and at least one of a or b is nonzero.
  • Students know that the graph of a linear equation ax + by = c , where a, b, and c are constants and at least one of a or b is nonzero, is the line defined by the equation ax + by = c.

Prior Knowledge

  • AlgebraLinear Equations
  • GeometryGraphs
8.EE.B.5 8.EE.B.6
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