Relationship between two variables  Relations and Functions
Relationship between two variables
This lesson will teach us the basic concepts of relationship between two quantities in the coordinate system. For instances, is y a dependent variable or independent variable? What is domain and range? What is an ordered pair? What is quadrant? And how do we plot points on a graph?
Lessons
Notes:
Coordinate System : A presentation of a real number by points on the real number line using an order pair.
Order pairs: A point ( x , y ) on the coordinate plane. Eg. (3,5), (0,5)…
Origin: The intersection of xaxis and yaxis $\to ( 0 , 0 )$
Relations: Sets of ordered pairs ( x , y )
Domain: All the xvalues on the coordinate system
Range: All the yvalues on the coordinate system
Independent Variable: The "x" values, which are also known as the inputs when solving for a solution.
Dependent Variable: The "y" values, which are also known as the outputs when solving for a solution.

1.
Understanding the difference between X & Y

2.
Express the relation using mapping notation and ordered pairs.

3.
Indicate the quadrant of the following points.

4.
Plot or find the points on the grid