Equations Of Slope Graphing Day 3

SLOPE-Intercept Review Peanut-Butter Jelly Time! SLOPE-Intercept Review

opposite the same reciprocals Equations – Notes

zero undefined Equations – Notes x = 5 y = 5 x = -3 y = 1 y-axis

equation slope coefficient x-term Equations – Notes

Are these lines parallel, perpendicular, or neither (oblique)? y = -3x and y = 3x Are the slopes the same? No Oblique Are the slopes the opposite reciprocals? No Class Example 1

Plot two points that would lie on the line perpendicular to line CD through point X. −6 9 = −2 3 Original slope -6 Opposite Reciprocal 𝟑 𝟐 Perpendicular slope +9 Any two of the purple dots are correct. Class Example 2

Line p contains the points (0, 2) and (-1, 5) Line p contains the points (0, 2) and (-1, 5). Which of the following pairs of points define a line parallel to line p? A. (4, 3) and (5, 6) B. (-1, 0) and (2, 1) C. (9, -2) and (3 ,0) D. (3, -1) and (4, -4) 5−2 −1−0 = 3 −1 =−3 Original slope 6−3 5−4 = 3 1 =3 A. Neither Oblique 1−0 2−−1 = 1 3 Opposite Reciprocal B. Perpendicular 0−−2 3−9 = 2 −6 = 1 −3 C. Neither Oblique −4−−1 4−3 = −3 1 =−3 Parallel D. Same Class Example 3

Student Example 1 Which line below would be parallel to x = 4? A. y = 4 B. x = -2 C. y = 4x D. y = -¼x Student Example 1

Plot two points that would lie on the line parallel to line CD through point X. Student Example 2

Line p contains the points (-2, 1) and (-2, 6) Line p contains the points (-2, 1) and (-2, 6). Which of the following pairs of points define a line perpendicular to line p? A. (4, 3) and (7, 6) B. (-1, 0) and (2, 2) C. (9, 0) and (3, 0) D. (-3, -1) and (-3, -4) Student Example 3