Writing Equations of Horizontal and Vertical Lines

What are the coordinates of the points given in Example 5?

• (3, 4) and (3, -1)

• (3, 4) and (4, 3)

• (4, 3) and (3, -1)

• (4, 3) and (4, -1)

What is the first step in finding the equation of a line through two points?

• Find the midpoint

• Find the slope

• Find the y-intercept

• Find the x-intercept

What is the result of dividing any number by zero?

• Zero

• One

• Undefined

• Infinity

What does an undefined slope indicate about the line?

• The line is horizontal

• The line has a positive slope

• The line has a negative slope

• The line is vertical

What is the equation of a vertical line passing through x = 3?

• x = -3

• y = 3

• x = 3

• y = -3

What are the coordinates of the points given in Example 6?

• (-2, -4) and (2, -1)

• (-4, -2) and (1, -2)

• (-4, -2) and (2, -1)

• (-2, -4) and (1, -2)

What is the slope of a line passing through points with the same y-coordinate?

• Negative

• Undefined

• Positive

• Zero

What does a slope of zero indicate about the line?

• The line is vertical

• The line is horizontal

• The line has a positive slope

• The line has a negative slope

What is the equation of a horizontal line passing through y = -2?

• y = 2

• x = -2

• y = -2

• x = 2

When will you always get zero as the slope?

• When y-coordinates are different

• When x-coordinates are different

• When x-coordinates are the same

• When y-coordinates are the same