Warm Up: Mon, 11/24

Linear FunctionsFinding Parallel & Perpendicular Lines

Using Slope

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.

TAPE TO YOUR RIGHT SIDE

IN THE BOX DESIGNATED FOR PARALLEL LINES…

• Draw a picture of two parallel lines

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 -

Homework

• Complete table with example problems

• Summary