Math Tutoring on Linear Equations in Two Variable and the Coordinate Plane and Plotting Points
In this lesson, we will be discussing Ordered Pairs and Plotting Points. We now begin looking at the relationships between two variables. Typically one variable is considered to be the input, and the other is called the output. The Input is the value that is considered first, and the Output is the value corresponding to or is matched with the input. The input/output designation may represent a cause/effect relationship, but that is not always the case. But because of this, we sometimes say that the input controls the output or that the output depends on the input. Whenever we have values that represent the input/output relationship, we can organize them and it is called an Ordered Pair, where for an ordered pair we have the input value comma, the corresponding output value in a set of parentheses.
To graph or plot points we use two perpendicular number lines called Axes. The Horizontal number line is called the x-axis, and we have the positive x values on the right and the negative x values on the left. The Vertical number line is called the y-axis, and the positive y values above the x-axis and the negative y values are below the x-axis. The point at which the axes cross is called the Origin, and every point on the coordinate plane is identified by what is called an Ordered Pair.
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2. What is the difference between x and y axes?
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