warm up: mon, 11/24. linear functions finding parallel & perpendicular lines using slope
TRANSCRIPT
Interactive Notebook
• Go to the next right page in your notebook.
• We should be around page 39 or 41.
Essential Question
How can you determine whether one line is parallel or perpendicular of another line?
Today I will learn…
• To determine if two lines are parallel, perpendicular or neither.
• To write the equation of a line that passes through a point and is parallel or perpendicular to a given line.
IN THE BOX DESIGNATED FOR NEITHER…
• Draw a picture of two lines that are neither parallel nor perpendicular
Notes for: (On the inside right side of foldable)
• PARALLEL LINES• Have the same
slope• Have different y-
intercepts • Never intersect• Ex. Double yellow
lines on the road
Notes for: (On the inside right side of foldable)
• PERPENDICULAR• The slopes are
negative reciprocals of each other (the product of the slopes is -1)
• Intersect to form a 90 degree angle
• Ex: a telephone pole
Notes for: (On the inside right side of foldable)
• NEITHER• Lines that
intersect but do not form a right angle and/or are neither parallel nor perpendicular
• Ex. Lines on a field
On the inside of the foldable, on the left side
• Give an example of • two equations that are parallel•Two equations that are perpendicular•Two equations that are neither parallel
nor perpendicular
Problems: write below foldable
Example Problem
Slope Parallel Slope
Perpendicular Slope
y=mx+b m m -