Parallel and Perpendicular Slopes and Equations

What is the formula for Point-Slope Form?

• y - y₁ = m(x - x₁)

• y = mx + b

• y + y₁ = m(x + x₁)

• y = mx - b

point (5, 3)
Slope  2
Write in point slope form and then convert to slope intercept form

• y = 2x - 7

• y = 2x + 3

• y  = 2x + 13

• y - 3 = 2(x - 5)

• 3

• 4

• 3x

• 4x

Tags

CCSS.8.EE.B.5

Write an equation that is parallel to the line
y = x - 5 through (1, -2)

• y = -3x +1

• y = x - 3

• y = x + 1

• y = 3x +1 

What is the slope perpendicular to the given line?

• -7/3

• 3/7

• -3/7

• 7/3

Tags

CCSS.8.EE.B.6

Which two equations below are perpendicular?

• y = 2x + 1 and y = -1/2x + 1

• y = 2x + 3 and y = 2x + 3

• y = 2x - 1 and y = 1/2x - 1

• y = x + 4 and y = -x + 2

Which two equations below are parallel?

• y = -3x + 2 and y = -2x + 2

• y = 3x + 1 and y = 3x + 1

• y = -x + 1 and y = -x - 2

• y = 3x - 4 and y = -1/3x - 2

Slopes of parallel lines are...

• opposite reciprocals.

• opposites.

• the same.

• always 7.

Tags

CCSS.8.EE.B.5

What is the slope of a line parallel to the line whose equation is: -2x + y = - 7?

• -2

• 1/2

• -1/2

• 2

Tags

CCSS.8.EE.B.5

A line is perpendicular to  
y = 2x - 7.
What is the slope of this line? 

• -2

• 1/2

• -1/2

• 2

Tags

CCSS.8.EE.B.6