Creating Equations of Parallel and Perpendicular Lines

What does the slope of a line indicate?

• The width of the line

• The steepness and direction of the line

• The color of the line

• The length of the line

How can you calculate the slope of a line using a graph?

• By measuring the angle of the line

• By counting the number of squares the line crosses

• By finding the midpoint of the line

• By using the rise over run method

What is the slope of a line parallel to another line with a slope of -1/2?

• -1/2

• 2

• -2

• 1/2

If a line has a y-intercept of -4 and is parallel to a line with a slope of -1/2, what is its equation?

• y = -1/2x + 4

• y = 1/2x - 4

• y = -1/2x - 4

• y = 1/2x + 4

What must be true for two lines to be parallel?

• They must have the same y-intercept

• They must have the same slope

• They must intersect at one point

• They must be horizontal

Given points (-2, 1) and (1, 0), what is the slope of the line passing through them?

• 1/3

• -3

• -1/3

• 3

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

• They are both zero

• Their product is -1

• They are equal

• Their sum is zero

If a line has a slope of -1/2, what is the slope of a line perpendicular to it?

• -1/2

• 2

• -2

• 1/2

How do you find the y-intercept of a line if it is not visible on the graph?

• By extending the graph

• By using the slope-intercept form algebraically

• By guessing

• By measuring the distance from the origin

What is the equation of a line with a slope of 2 passing through the point (5, -2)?

• y = -2x - 12

• y = 2x + 12

• y = 2x - 12

• y = -2x + 12