Parallel and Perpendicular Lines

Point-slope form

• y - y₁ = m (x - x₁)^

• y= mx + b

• ax + by = c

• a² + b² = c²

Slope= -5, y-intercept= 7, what is the equation of the line?

• y= -5x + 7

• y= 7x - 5

• y - 5 = 7x

• -5x + 7y = 0

What is the slope of a line that is parallel to the line y=2/3 x - 1?

• 2/3

• 3/2

• -3/2

• -1

What is the slope of a line that is perpendicular to the line y=2/3 x - 1?

• 2/3

• 3/2

• -3/2

• -1

What is the equation of a line that is parallel to equation y=4x-3 and goes through point (0, 9)

• y= 4x + 9

• y= -4x + 9

• y= -1/4 x + 9

• y= 4x

What is the equation of the line that is perpendicular to line y=3/4 x- 5 and goes through point (0, -1)?

• y= -3/4 x - 1

• y= -4/3 x - 1

• y= 3/4 x - 1

• y= 4/3 x - 1

Which of the following equations represent a line that is perpendicular to the line represented by y=2/5 x +7?

• y=2/5 x - 7

• y= -5/2x

• y= 2/5x + 3

• y= -2/5x + 7

Which of the following represents a line that is parallel to y=3x+1 and goes through point (2, 2)? Recall point-slope form: y - y₁ = m (x - x₁)^

• y=3x - 4

• y=3x + 4

• y= -1/3 x + 4

• y= -1/3 x - 4