- a line that is parallel to the Y-axis.
- a method of solving equations where you get rid of one variable in order to solve for the other.
- an inadequate way to solve equations.
- a line that is parallel to the X-axis.
- two lines that create four right angles at their point of intersection.
- lines that ALWAYS run side by side and NEVER cross.
- y2-y1 over x2-x1=M
- a method of solving equations with a lone variable.
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