Quiz on Lessons 4-5, 4-6, and 4-8

Algebra 1 Advanced Quiz - Slope-Intercept Form, Point-Slope form, and Parallel and Perpendicular Lines

What does m mean?

slope

What does b mean?

y-intercept

What is the slope-intercept form?

y=mx+b

What is the point-slope form?

y-y₁=m(x-x₁)

What are parallel lines?

A pair of coplanar lines that never intersect

What are perpendicular lines?

A pair of lines that intersect at a 90 degree angle

What is the notation for parallel lines?

a||b

What is the notation for perpendicular lines?

a⊥b

How is the slope between parallel lines?

It is the same

How is the slope between perpendicular lines?

It is opposite and reciprocal

Lines are parallel if

m₁=m₂ and b₁≠b₂

Lines are perpendicular if

m₁⋅m₂=-1

What is a perpendicular bisector?

A line that cuts a segment in half and creates a 90 degree angle with that segment

What is the midpoint formula?

((x₁ + x₂)/2, (y₁ + y₂)/2)