Warmups Write an equation in standard form: (1,2)(5,-2)

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Presentation transcript:

Warmups Write an equation in standard form: (1,2)(5,-2) Find the slope and y-intercept: 6x + y = 12 y + 3 = -1(x + 1) Determine the value of r: (1, r) (r, -2)

QUIZ TIME!!! Take out a pencil and Calculator Please put everything else away

6-6 Parallel and Perpendicular Lines Objective: To identify if two lines are parallel, perpendicular or neither

Parallel vs. Perpendicular Parallel – Lines have the same slope // ex: -2 and -2 1 1 Perpendicular – Lines have opposite/reciprocal slopes . ex: -2 and 1 1 2 90°

Example 1 Graph the following lines on the same graph: y = -2x + 4 Are they parallel, perpendicular, or neither? // n

Example 2 and Then circle parallel, perpendicular or neither

Example 3 2x + 3y = 6 and Then circle parallel, perpendicular or neither

Example 4 and y = -3x + 2 Then circle parallel, perpendicular or neither

Homework Pg. 367 #18-23 & Pg. 771(6-6) #1-6 Look at the SLOPE Same = parallel Opposite (opposite sign & reciprocal) = perpendicular Neither = neither You do not have to graph on the homework!!