Basically.
If the inequality's sign is < or ≤, then you shade the part under the line.
If the inequality's sign is > or ≥, then you shade the part over the line.
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A system of linear equations is two or more simultaneous linear equations. In mathematics, a system of linear equations (or linear system) is a collection of linear equations involving the same set of variables.
Linear Algebra is a branch of mathematics that enables you to solve many linear equations at the same time. For example, if you had 15 lines (linear equations) and wanted to know if there was a point where they all intersected, you would use Linear Algebra to solve that question. Linear Algebra uses matrices to solve these large systems of equations.
The statement "A system of linear equations is a set of two or more equations with the same variables and the graph of each equation is a line" is true.
By looking st two linear equations you can tell that the corresponding lines are parallel when the slope is the same. The slope controls where the line is.
coincidental -Lines that share the same solution sets.