8.1 Relationship between two variables
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 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