Chapter 2 Section 2
Part II
Algebra 2 Notes
January 13, 2009
Warm-Ups

Create a mapping of the following relation. Determine
whether or not it is a function:
{(-3.5, 5), (0, -2), (0, 4), (1, -2)}

Find the slope of the intercepts of the following line:

Find the slope of the
line graphed to the
right:
2
5
-2
Quick Review

Point-Slope Form

Standard Form:

Slope-Intercept Form:
Writing an Equation

Write in standard form an equation of
the line with the slope
through the
point (8, -1)
Try One!

Write in standard form the equation of a
line with slope 2 which runs through the
point (4, -2)
Writing an Equation

Write in point-slope form the equation
of the line through the points (1, 5) and
(4, -1)

Write in point-slope form the equation of
the line through the points (5, 0) and (-3,
2)
Special Properties of Lines
Page 66

Horizontal Line
Slope is Zero

Vertical Line
Slope is
Undefined
Special Properties of Lines
Continued

Perpendicular Lines
Slope:
Opposite
Reciprocals of each
other

Parallel Lines
Same Slope
Different y-intercepts
Write an Equation

Write an equation of the line through the
point (0, 4) and perpendicular to the line:
Try One!

Write an equation of the line through the
point (5, -3) and perpendicular to the line:
Piecewise Activity
Page 71

A piecewise function has different rules
for different parts of it’s domain.
◦ The different “pieces” of the graph each has
its own function

Reminder: What’s a domain?

In a group, do #3, 4, and 5
Homework #5
 Pg
68 #20, 24, 26, 30, 38, 39,
43, 45, 48, 51, 57, 60