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Today in Algebra 2

Today in Algebra 2. Go over homework Notes Linear Equations Definitions Standard form of linear equation x- and y-intercepts Study Guide Homework. Linear Equations. An equation whose graph is a line is a linear equation The standard form of a linear equation is Ax + By = C,

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Today in Algebra 2

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  1. Today in Algebra 2 • Go over homework • Notes • Linear Equations Definitions • Standard form of linear equation • x- and y-intercepts • Study Guide • Homework

  2. Linear Equations • An equation whose graph is a line is a linear equation • The standard form of a linear equation is Ax + By = C, where A,B, and C are real numbers and A & B are not both zero.

  3. Examples: 5x – 3y = 7 x = 9 6s = -3t – 15 Not Linear: 7a + 4b2 = -8 x + xy = 1

  4. Write the following equations in standard form: y = -5x + 6 5x = 25 + 10y

  5. Intercepts The y-intercept is where the graph touches or crosses the y-axis. So where x = 0 The x-intercept is where the graph touches or crosses the x-axis. So where y = 0

  6. Find the x- and y-intercepts for 5x – 3y = 15 y-intercept let x = 0 5(0) – 3y = 15 -3y = 15 y = -5 y-intercept is (0, -5) x-intercept let y = 0 5x – 3(0) = 15 5x = 15 x = 3 x-intercept is (3,0)

  7. Homework • Pg 77: 18,19, 29-39odd.

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