Prealgebra

# Key Terms

PrealgebraKey Terms

### Key Terms

horizontal line
A horizontal line is the graph of an equation that can be written in the form $y=by=b$. The line passes through the y-axis at $(0,b).(0,b).$
intercepts of a line
Each of the points at which a line crosses the x-axis and the y-axis is called an intercept of the line.
linear equation
An equation of the form $Ax+By=C,Ax+By=C,$ where $AandBAandB$ are not both zero, is called a linear equation in two variables.
ordered pair
An ordered pair $(x,y)(x,y)$ gives the coordinates of a point in a rectangular coordinate system. The first number is the $xx$-coordinate. The second number is the $yy$-coordinate.
$(x,y)x-coordinate,y-coordinate(x,y)x-coordinate,y-coordinate$
11.1
origin
The point $(0,0)(0,0)$ is called the origin. It is the point where the the point where the $xx$-axis and $yy$-axis intersect.
The $xx$-axis and $yy$-axis divide a rectangular coordinate system into four areas, called quadrants.
slope of a line
The slope of a line is $m=riserunm=riserun$. The rise measures the vertical change and the run measures the horizontal change.
solution to a linear equation in two variables
An ordered pair $(x,y)(x,y)$ is a solution to the linear equation $Ax+By=CAx+By=C$, if the equation is a true statement when the x- and y-values of the ordered pair are substituted into the equation.
vertical line
A vertical line is the graph of an equation that can be written in the form $x=ax=a$. The line passes through the x-axis at $(a,0).(a,0).$
x-axis
The x-axis is the horizontal axis in a rectangular coordinate system.
y-axis
The y-axis is the vertical axis on a rectangular coordinate system.

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