Concepts 1.1

1
Bell Work 1/13/15
Write in slope-intercept form the equation of the
line passing through the given point and PARALLEL
to the given line.
2
Yesterdays Homework

• Any questions?
• Please pass your homework to the front.
• Make sure the correct heading is on your paper.
• Is your NAME on your paper?
• Make sure the homework is 100 complete.
• Incomplete work will NOT be accepted.

3
Heading
6/20/2016
Slopes of Parallel and Perpendicular Lines (perp.)
TSWBAT write an equation in slope-intercept form
given a point and a perpendicular line.
Students understand the concepts of parallel
lines and perpendicular lines and how those
slopes are related. Students are able to find the
equation of a line perpendicular to a given line
that passes through a given point.
4
Notes
Graph the lines.
Ex.
b beginning
m move

• Perpendicular Lines

Two lines that intersect at right angles.

• Their slopes are OPPOSITE RECIPROCALS.

5
Notes
Find the opposite reciprocal.
Ex.
Ex.
Ex.
Now you try.
Ex.
Ex.
Ex.
6
Notes
Determine if the two lines are PERPENDICULAR.
Ex.
Ex.
Yes
No
Now you try.
Ex.
Ex.
No
Yes
7
Notes
Write in slope-intercept form the equation of the
line passing through the given point and
PERPENDICULAR to the given line.
Now you try.
Ex.
Ex.
Label your points.
What is our slope?
8
Notes
Write in slope-intercept form the equation of the
line passing through the given point and
PERPENDICULAR to the given line.
Ex.
Ex.
Now you try.
Label your points.
What is our slope?
9
Summary
To find the equation of a ____ perpendicular to
another line and that goes through a specific
point you first just take oppoiste __________ of
the slope from the given line. With that slope
and the given point plug it into the point-______
formula and solve for y.
line
reciprocal
slope
10
Todays Homework
Rules for Homework

• Pencil ONLY.
• Must show all of your work.
• NO WORK NO CREDIT
• Must attempt EVERY problem.
• Always check your answers.

11
Homework 5.7B
Determine if the two lines are PERPENDICULAR.
Write in slope-intercept form the equation of the
line passing through the given point and PARALLEL
to the given line.
12
Ticket Out the Door
Complete the Ticket Out the Door without
talking!!!!!
Talking time after the bell!
Put your NAME on the paper.
When finished, turn your paper face DOWN.
Write in slope-intercept form the equation of the
line passing through the given point and
PERPENDICULAR to the given line.