Slope and Parallel and Perpendicular Lines

Find the Slope of the line shown in the graph.

• -2/3

• 2/3

• -3/2

• 3/2

Are the given lines, parallel, perpendicular, or neither. Explain.

• Parallel, they have the same slopes.

• Perpendicular, because their slopes are opposite reciprocals.

• Neither, because their slopes are not the same and are not opposite reciprocals.

• Neither, because their slopes are zero.

The points in the table lie on a line. What is the slope of the line?

• -3/2

• -2/3

• 2/3

• 3/2

What describes the slope of the line shown on the graph?

• Positive

• Negative

• Zero

• Undefined

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

What is the slope of a line parallel to the line whose equation is -6x + y = -7?

• 6

• -6

• 1/6

• -1/6

Find the slope of the line that is parallel to the graph of

y= 2/9 x - 4.

• 2/9

• 9/2

• -2/9

• -9/2

Find the slope of a line parallel to the line below.
y = 2x + 4

• 2

• -1/2

• 1/2

• -2

Find the slope of a line parallel to the line below y = ½x + 4

• 1/2
  

• -1/2

• 2

• -2

What is the slope of a line parallel to the line whose equation is: -2x + y = - 7?

• -2

• 1/2

• -1/2

• 2