Warm up Find the slopes of the following

Warm up Find the slopes of the following points: 1. (2, 6) and (4, 8) m=1 2. (2, -3) and (5, -1) 3. (4, 3) and (4, 8) undefined

Questions over hw?

Identify the slope and the y-intercept y=x– 4 m=1 b = -4

Identify the slope and the y-intercept m = -5/7 b=0

Identify the slope and the y-intercept y = 3 x + 12 m=3 b = 12

Identify the slope and the y-intercept 3 x + 2 y = 6 m = -3/2 b=3

Identify the slope and the y-intercept y = -12 m=0 b = -12

Identify the slope and the y-intercept 14 x – 7 y = -28 m=2 b=4

Identify the slope and the y-intercept x= 8 m = undefined b = none

Identify the slope and the y-intercept m = -1/4 b=3

Identify the slope and the y-intercept m=4 b = -3

Identify the slope and the y-intercept m = -1/2 b=0

Daily Check

Parallel Lines n Graphs: Lines NEVER intersect n Equations: Same Slopes n Different y-intercepts n

Perpendicular Lines n Graphs: Lines intersect at 90º n Equations: Opposite Reciprocal Slopes n With the same or different y-int n

“Neither” n Graphs: intersect, but not at 90º n Equations: n NOT the same slope and are NOT opposite reciprocal slopes

Are these lines parallel, perpendicular, or neither? y = 3 x + 2 y = 3 x – 8 parallel

Are these lines parallel, perpendicular, or neither? y = 5 x – 16 y = -5 x – 23 Neither

Are these lines parallel, perpendicular, or neither? x = -1 x=7 parallel

Are these lines parallel, perpendicular, or neither? y = -2 x – 4 perpendicular

Are these lines parallel, perpendicular, or neither? 1. y = -2 x + 1 y = -2 x – 4 2. y = 3 x – 4 y = -3 x + 1 3. y = 1/5 x + 2 y = -5 x + 6 parallel neither perpendicular

Are these lines parallel, perpendicular, or neither? 4. y = -2 x + 1 y = -1/2 x – 4 5. y = 3 x – 4 y = 1 + 3 x 6. y = 5/6 x + 2 y = -6/5 x + 6 neither parallel perpendicular

Comparing Slopes Worksheet

Finish the ws for homework