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Warm UpWrite an equation using point-slope form.
1. , and
2. and
2.4 Day 2
Writing Equations
Day 2
Horizontal
Vertical
Parallel
Perpendicular
Horizontal Lines
What do horizontal lines look like?
Do you have a trick/hint that helps you remember that?
Horizontal Lines
Graph the following points.
Find the slope.
Review Questions
Why do you think the slope?
Come up with two new points that will also give you a slope of zero!
Vertical Lines
What do vertical lines look like?
Do you have a trick/hint that helps you remember that?
Vertical Lines
Graph the following points.
Find the slope.
Review Questions
The calculator said error because we divided by zero.
Come up with two new points that would also cause a calculator error!
HOY VUXGraphing Horizontal and Vertical LinesEach student will be given a worksheet to overview horizontal and vertical lines.
Parallel vs. PerpendicularParallel same slope
Perpendicular opposite reciprocals
and
and
ExamplesDetermine whether the graphs of each pair of equations are parallel, perpendicular, or neither.1.
2.
ExamplesDetermine whether the graphs of each pair of equations are parallel, perpendicular, or neither.1.
2.
You Try!Determine whether the graphs of each pair of equations are parallel, perpendicular, or neither.
1.
2.
Review QuestionSummarize to a neighbor the rules about parallel and perpendicular.
Be prepared to share what your neighbor said.
Parallel vs. PerpendicularAre the lines L1 and L2 passing through the given pairs of points parallel, perpendicular, or neither?
1. L1: ; L2:
2. L1: ; L2:
3. L1: ; L2:
You Try!!!Are the lines L1 and L2 passing through the given pairs of points parallel, perpendicular, or neither?
L1: ;
L2:
Extra PracticeAre the lines L1 and L2 passing through the given pairs of points parallel, perpendicular, or neither?
1. L1: ; L2:
2. L1: ; L2:
Parallel vs. PerpendicularWrite an equation in slope-intercept form of the line…
Parallel to:
and goes through .
Perpendicular to:
and goes through .
ExamplesWrite the equation in slope-intercept form of the line for each equation that passes through the given point.
1. Parallel to through
2. Perpendicular to through
Homework
Lesson 2.4Pg. 86-87 #’s 6-7, 23-26