What is the distance formula between two points (x₁, y₁) and (x₂, y₂)?
Hint: It comes from the Pythagorean Theorem
What is the midpoint formula?
What is the slope formula?
What is the slope-intercept form of a line?
What is the point-slope form of a line?
What is the relationship between slopes of perpendicular lines?
What is the relationship between slopes of parallel lines?
What is the standard form of a linear equation?