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### 22 Cards in this Set

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 Relation A set of ordered pairs Domain The set of x-coordinates in a relation Range The set of y-coordinates in a relation Function a relation in which each element of the domain is paired with EXACTLY ONE element in the range Vertical Line Test Using a straightedge to represent a vertical line, move the straightedge from left to right on the graph. For each value of x, the vertical line can only pass through ONE point on the graph. Positive relationship in a scatter plot points appear to suggest a line that slants upward from left to right Negative relationship in a scatter plot points appear to suggest a line that slants DOWNWARD from left to right No relationship in a scatter plot points seem to be random linear equation an equation with two variables whose graph is a straight line. It has an infinite number of solutions funtional notation equations represented as functions and are written in the form "f(x)" slope of a line (1) describes steepness (2) vertical change ÷ horizontal change or change in "y" ÷ change in "x" or diff in y-coord ÷ diff in x-coord parallel lines lines that will never intersect because they have the same slope 4 Types of slope (1) positive (2) negative (3) zero (4) no slope Zero slope slope is horizontal line undefined (no) slope a vertical line x-intercept where the graph crosses the x-axis (y-coordinate is zero) y-intercept where graph crosses the y-axis (x coordinate is zero) origin where the x-axis and y-axis intersect slope-intercept form of the line y = mx + b where m = slope and b = y-intercept standard form of a line Ax + By = C A, B, and C are integers and A is positive system of equations several linear equations graphed together in the same coordinate plane solution to a system of equations the ordered pair that is a solution of ALL linear equations in the system