Aim: How do we write equations of lines parallel or perpendicular to a given line?HW: Complete WorksheetDo Now: 1. Find the slope of the line given above

2.Find the slope of a line parallel to the line given above.

Parallel lines are lines that never intersect and always the same distance apart.

Perpendicular lines are lines that intersect at a common point to create a right angle.

l

m

The slope of parallel lines are the same.y=3x+5 is parallel to y=3x-5

m=3 m||=3

The slope of perpendicular lines are negative reciprocals.

y= 3x+5 is perpendicular to y= -1/3x-5m=3 m |= -1/3

What are the two ways to formulate a linear equation?

1. Write an equation for the line that is parallel to y=6x-2 and passes through the point (0,0).

2. Write an equation for the line that is perpendicular to y=2x+7 and passes through the point (1,-10)

PAIR SHARE!!

On the worksheet, do questions #1(a-d) and #2 (a-b) with the people around you.

The rest of the worksheet will be for homework.