Slope of Parallel and Perpendicular Lines

What is the slope of a line perpendicular to 5?

• 1/5

• -1/5

• 5

• -5

What is the slope of a line parallel to y = 2x + 3?

• 1

• 2

• 3

• 4

If two lines are parallel, their slopes are...

• the same.

• different but equal in magnitude.

• always zero.

• undefined.

Are the lines shown parallel, perpendicular, or neither?

• Parallel

• Perpendicular

• Neither

• Intersecting

What slope is parallel to: m = 3/4?

• 1/2

• 3/4

• 5/6

• 2/3

Slopes of perpendicular lines are...

• equal

• opposite reciprocals

• negative

• positive

The slope of a vertical line is...

• 0

• 1

• undefined

• infinity

The slope of a horizontal line is...

• 1

• -1

• 0

• undefined

In the equation of a line y = mx + b, m represents...

• the y-intercept of the line.

• the slope of the line.

• the x-intercept of the line.

• the constant term in the equation.

If a line has a slope of -3, what is the slope of a line perpendicular to it?

• -1/3

• 1/3

• 3

• -3