Characteristics of Linear Functions (pp. 1 of 8)
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1 Characteristics of Linear Functions (pp. 1 of 8) Algebra 2 Parent Function Table Linear Parent Function: x y y = Domain: Range: What patterns do you observe in the table and graph of the linear parent function? Review: Characteristics Characteristics of linear functions (such as slope, intercepts, and equations) have been addressed in previous math courses. Forms of Linear Equations Standard Form: Point-Slope Form: Slope-Intercept Form: Slope-Intercept Form In the slope-intercept form, explain how changes in m (the slope) and b (the y-intercept) affect the graph of the parent function. Changes caused by m Changes caused by b
2 Characteristics of Linear Functions (pp. 2 of 8) Algebra 2 Finding Slope How would you define slope? Explain how to find slope from each representation. Graph Table Two Points Equation x y (-1,3) and (4, -5) A) y 2x 4 2 B) 5 x y 3 C) 3x y 8 Count Find Compute Look Finding Intercepts What is an intercept? Explain how to find a y-intercept from each representation. From the graph: Determine where the line would cross the From a table: Look for the point From the y mx b equation: Identify the From any equation: Plug in, then solve for Explain how to find an x-intercept from each representation. From the graph: Determine where the line would cross the From a table: From an equation: Look for the point Plug in, then solve for
3 Characteristics of Linear Functions (pp. 3 of 8) Algebra 2 Finding Equations There are several ways to determine the equation of a line, depending on the given information. If you have Then plug values into The slope and y-intercept The slope, and coordinates for a point Coordinates for two points A table of data Special Lines and Slopes Lines Slopes Sample Equation(s) Horizontal Lines Vertical Lines Parallel Lines Perpendicular Lines Sample Problems Provide information about each linear function. 1. x y A) Fill in the table of values. B) Determine the slope. C) Find the equation for the line.
4 Characteristics of Linear Functions (pp. 4 of 8) Algebra 2 2. x y A) Graph the function. B) Determine the slope. C) Find the equation for the line. 3. x y Equation: y 2 x 4 3 A) Complete a table of values. B) Graph the function. C) Write down the slope.
5 Algebra 2 Characteristics of Linear Functions (pp. 5 of 8) From the given information, find the equation of the line both in slope-intercept and standard forms. 4. The slope of 2 1 and contains point ( 2, 5) 5. Contains points (2, -3) and (-6, 1) 6. Contains point (0, 4) and is parallel to y = 2x Contains point (-4, 5) and is perpendicular to 2x + 3y = 7 8. Contains (5, 1) and is perpendicular to y = Contains (5, 1) and is parallel to y = Contains (-2, -7) and is perpendicular to x = 4.
6 Algebra 2 Characteristics of Linear Functions (pp. 6 of 8) Practice Problems 1. x y A) Fill in the table of values. B) Determine the slope. C) Find the equation for the line. 2. x y A) Graph the function. B) Determine the slope. C) Find the equation for the line.
7 Algebra 2 Characteristics of Linear Functions (pp. 7 of 8) 3. x y Equation: y 3 x 5 2 A) Complete a table of values. B) Graph the function. C) Write down the slope. Given information, find the equation of the line in y-intercept and standard forms. 4. The slope of 3 and contains the point (0, 3) 5. The slope of 3 5 and contains point (-6, -2) 6. Contains points (4, -1) and (-2, -13) 7. Contains point (-1, 2) and is parallel to x 2y = Contains point (5, -3) and is perpendicular to y = 5x Contains (-4, 3) and is perpendicular to y = Contains (8, -1) and is parallel to y = Contains (-2, -3) and is perpendicular to x = 2.
8 Algebra 2 Characteristics of Linear Functions (pp. 8 of 8) 12. For each of the linear functions on the graph below, compare it to the linear parent function in terms of vertical shifts and vertical compressions. Identify the parameter that determines the change and determine the function rule. Graph Transformations/Changes Equations A) A) B) B) A) A) B) B)
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