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Distance Formula
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Midpoint Formula
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Circle
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The set of all point in a plane that lie a fixed distance from a given point in the plane.
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Linear Equation
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Any equation in the form Ax + By = C. The graph of a linear equation is a line.
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X-Intercept
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The point where the graph crosses the x-axis.
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Y-Intercept
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The point where the graph crosses the y-axis
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Zero of an equation
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The solution to the equation
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Root of an equation
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The solution to the equation
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Slope
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A numeric meausre of the steepness of a line.
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Point-Slope Form of an Equation
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Y - y1 = m(x - x1) where m = slope of the line and (x1, y1) represent a point on the line
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Slope-Intercept Form of an Equation
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Y = mx + b where m = slope of the line and b represents the y-intercept of the line
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Perpendicular lines
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Two lines that intersect at a right angle. The slopes of perpendicular lines are opposite reciprocals of each other.
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Parallel lines
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Two lines that do not intersect. The slope of parallel lines are the same.
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Function
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A rule that assigns each element in one set to a unique element in a second set.
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Vertical Line Test
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A graph is the graph of a function if and only if there is no vertical line that crosses the graph more than once.
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