Parallel & Perpendicular Slopes

Parallel & Perpendicular Slopes

Quick Review

• What is the m of y=2x+1?

• m= 2

• What is the m of y= -1/3x+8?

• m= -1/3

• Find m of (4,1) and (6,2)

• m= 1/2

Parallel Slopes

• Parallel Slopes are the SAME as the original slope

• m=2, so IIm=2

• m=-1/3, so IIm=-1/3

• m=4/3, so IIm= 4/3

• y=6x-1, so m=6 and IIm=6

• y= -3/5x+1, so m=-3/5 and IIm=-3/5

Multiple Choice

Find IIm if m= 3

• IIm= 3

• IIm= -3

• IIm= 1

Multiple Choice

Find IIm if m= 2/5

• IIm= -5/2

• IIm= 2/5

• IIm= 1

Multiple Choice

Find IIm if y=2x-1

• IIm=-1

• IIm= 5

• IIm=2

Multiple Choice

Find IIm if y=-7/8x+2

• -7/8

• 2

• 8/7

Perpendicular Slopes

• Perpendicular Slopes are OPPOSITE RECIPROCALS

• m= -3/2 so Perpendicular m = 2/3

• m= -1/3 so Perpendicular m = 3/1

• m= 4/3 so Perpendicular m = -3/4

• m=2 so Perpendicular m = -1/2

• y= 6x-1 so Perpendicular m = -1/6

• y= -3/5x+2 so Perpendicular m = 5/3

Multiple Choice

Find Perpendicular m if m= 3

• 3

• 1/3

• -1/3

Multiple Choice

Find Perpendicular m if m= 2/5

• -5/2

• 2/5

• 5/2

Multiple Choice

Find Perpendicular m if y= 2x-1

• 2

• -1/2

• -1

Multiple Choice

Find Perpendicular m if y=-7/8x+2

• -7/8

• 2

• 8/7

Multiple Select

What is the Parallel m if m=2

• m= 2

• m= -1/2

Multiple Select

What is the Perpendicular m if m= -4/5

• 5/4

• -4/5

Multiple Select

What is the Parallel m of y=1/3x+2

• 1/3

• -3

Multiple Select

What is the Perpendicular m of y=-2/3x+2

• -2/3

• 3/2

Poll

How are you feeling about finding Parallel & Perpendicular Slopes? Be honest!!!!!!

• I rock at this!

• Pretty good, pretty good!

• What is going? I have no idea!

Multiple Choice

Find Perpendicular m if m= 2/5

• -5/2

• 2/5

• 5/2

HW: Ixl.com

Geometry X.5

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