# Key Terms Equations

• System of Equations- a set of 2 or more equations.
• Graph of a Linear Inequality- The solutions of a linear inequality, forming a half-plane on one side of a line and may or may not also form the line itself.
• Linear Function- An equation in which the graphs of the solutions form a (non-vertical) line.
• Linear Inequality- An inequality in two variables for which the graphs of the solutions form a half-plane on one side of a line and may or may not also form the line itself.
• Slope- The steepness (the ratio of rise to run) of a line, which may be calculated by finding the ratio of the difference between the y values of two points on the line to the difference between the corresponding x values of those two points on the line.
• Slope-Intercept Form- One method used to write an equation of a line; uses the form y = mx + b, where m is the slope and b is the y-intercept.
• Standard Form of a Linear Equation- One method used to write an equation of a line; uses the form Ax + By = C.
• Solution- A number (or ordered pair of numbers, or set of numbers) that produces a true statement when substituted for the variable(s) in an equation or inequality.

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