This unit contains three parts which serve to help students understand slope and linear equations. The first link takes visitors to a lesson overview in which the equations of lines are discussed (Slope Intercept Form, Point Slope Form, Horizontal Line Form, and Vertical Line Form). There are then six example questions for teacher to work through with students. The second link leads to a set of practice problems for students to work through alone or in groups. The third link is an activity in which students receive a figure drawn on grid paper and are asked to find the equation for each of the ten lines, if any lines are undefined, if any lines are parallel, and if any lines are perpendicular.
5. Graph proportional relationships, interpreting the unit rate as the slope of the graph. Compare two different proportional relationships represented in different ways.
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3. Interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear.
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5. Prove the slope criteria for parallel and perpendicular lines and use them to solve geometric problems (e.g., find the equation of a line parallel or perpendicular to a given line that passes through a given point).
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