Exploring Parallel and Perpendicular Lines

What is the slope of a line that moves up 2 units for every 1 unit it moves right?

• -2

• 1/2

• -1/2

• 2

If two lines are parallel, what can be said about their slopes?

• They are reciprocals

• They are equal

• They are negative reciprocals

• They are unequal

What is the y-intercept of a line with the equation y = 2x + 3?

• -3

• -2

• 3

• 2

What happens if the slope of a parallel line is slightly increased?

• The lines intersect

• The lines remain parallel

• The lines become perpendicular

• Nothing changes

If the slope of a line is decreased slightly from 2, what happens to the line in relation to another parallel line with slope 2?

• It remains parallel

• It becomes perpendicular

• It moves away without intersecting

• It intersects the other line

What defines a perpendicular line in terms of slope?

• Same slope

• Zero slope

• Negative reciprocal slope

• Infinite slope

If a line has a slope of 3, what would be the slope of a line perpendicular to it?

• 3

• -3

• 1/3

• -1/3

What is the general relationship between the slopes of perpendicular lines?

• Positive reciprocals

• Equal

• Opposite

• Negative reciprocals

What is the slope of a line perpendicular to a line with slope 1/2?

• 1/2

• 2

• -1/2

• -2

If a line's equation is y = -2x + 4, which of the following slopes would be perpendicular to it?

• -2

• 2

• -1/2

• 1/2