A linear equation in one variable is an equation that can be written in the form Intersection-of-Graphs Method of Graphical Solution To solve the equation graphically, solve The x-coordinate of any point of intersection of the two graphs is a solution of the equation. Agreement of Inclusion of Exclusion of Endpoints for Approximations When an approximation is used for an endpoint in specifying an interval, we continue to use parentheses in specifying inequalities involving < or > and square brackets in specifying inequalities involving < or >.

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