intro 50 2 Let's work with slope and parallel & perpendicular lines. reminder The slope (tilt) of a line has a numerical value. attention rectangle Choose a point and subtract. attention rectangle Watch your signs! attention rectangle Do you see this on your study guide? prompt 460 60 2 300 10 Pause the video. Plot and label on your study guide. attention rectangle Pay attention -- special cases up next! The y-value in both points is ___ . 2 Points with the same y-values form a ____ line. horizontal vertical diagonal horizontal The same x values of -2 tell us the line will be ________ . vertical horizontal diagonal vertical reminder It is undefined because you can't divide by zero! prompt 460 60 2 10 300 Get ready! Here come some answers for your study guide.