Identifying Slopes as Parallel, Perpendicular or Neither

Are the lines parallel, perpendicular, or neither?
y = 3x – 7
y = 3x + 1

• Parallel

• Perpendicular 

• Neither

y = 9 /2 x - 4 and 2x + 9y = 18

• Parallel

• Perpendicular

• Neither

y = - 2 /3 x - 1 and -3x + 2y = 6

• Parallel

• Perpendicular

• Neither

y = 1 /2 x - 15 and -x + 2y = 6

• Parallel

• Perpendicular

• Neiter

Are the slopes below parallel, perpendicular, or neither?

• Parallel

• Perpendicular

• Neither

Choose the best answer to fill in the blanks. Parallel lines always have the ​ (a)   slope. Perpendicular lines have slopes that are ​ (b)   . The product of perpendicular slopes always equals ​ (c)  

• same

• negative reciprocals

• -1

• reciprocals

• 1

• different

Choose the best answer to fill in the blanks.

Parallel lines always have the ​ (a)   slope.

Perpendicular lines have slopes that are ​ (b)   .

The product of perpendicular slopes always equals ​ (c)  

• same

• negative reciprocals

• -1

• reciprocals

• 1

• different

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