6:NS.6b-Understand signs of numbers in ordered pairs as indicating locations in quadrants of the coordinate plane.
6.NS.6c - Find and position integers and other rational numbers on a number line diagram; find a position pairs of integers and other rational numbers on a coordinate plane.
6.NS.8 - Solve real-world and mathematical problems by graphing points in all four quadrants of the coordinate plane. Include use of coordinates and absolute value to find the distances between points with the same first coordinate or the same second coordinate.
6.EE.9 - Use variables to represent two quantities in real-world problem that change in relationship to one another; write an equation to express one quantity, thought of an the dependent variable, in terms of the other quantity, thought of as the independent variable. Analyze the relationship between the dependent and independent variables using graphs and tables.