6.1 Graphs of Equations in Two Unknowns

1. Graph the solution set of an equation in two unknowns.

2. Find x- and y-intercepts of an equation in two variables.

3. Find the slope of a line, including vertical and horizontal.
   • Slope of a line from a graph - positive slope (Mathispower4u)
   • Slope of a line from a graph - negative slope (Mathispower4u)
   • Slope of a line from a graph - horizontal and vertical lines (Mathispower4u)
   • Slope of a line - from two points on the line (Mathispower4u)
   • Slope of a line - from two points on the line, more examples (Mathispower4u)
   • Slope of a line - from two points,horizontal and vertical lines (Mathispower4u)
   
   
4. Know and apply the relationship between slopes of parallel and perpendicular lines.
   • Slopes of parallel and perpendicular lines

5. Graph a line, given its equation; give the equation of a line having a given graph.
   • Graphing a line whose equation is given in slope-intercept form (Mathispower4u)
   • Graphing a line whose equation is given in slope-intercept form (Mathispower4u)
   • Graphing a line whose equation is given in slope-intercept form (Mathispower4u)
   • Graphing a line whose equation is given in Ax + By = C form (Mathispower4u)
   • Equation of a line from a graph (Mathispower4u)
   • Equation of a line from a graph (Mathispower4u)
   • Equation of a line from a graph - horizontal and vertical lines(Mathispower4u)
   
   
6. Determine the equation of a line through two points.
   • Equation of a line from two points on the line (Mathispower4u)
   • Equation of a line from two points on the line (Mathispower4u)
   
   

7. Use a given linear model of a “real” situation and a given value of either of the two linearly related quantities to find the value of the other.
8. Given a linear model of a “real” situation, interpret the values of the slope and intercept.