TODAY IN ALGEBRA…

Warm Up: Graphing functions given the domain

Learning Goal: 4.2 You will graph linear equations in a coordinate plane

Formative Assessment/Independent Practice

Mid. Ch.4 TEST-Monday/Tuesday!

WARM UP: Graph with domain -2, -1, 0, 1, 2.

−2−10

12

− (−2 )−2− (−1 )−2− (0 )−2

− (1 )−2− (2 )−2

0−10

−3−4

4.2 GRAPHING LINEAR FUNCTIONS: With restricted domainsEXAMPLE 1: Graph with domain

−2−10

12

− (−2 )−2− (−1 )−2− (0 )−2

− (1 )−2− (2 )−2

0−10

−3−4

4.2 GRAPHING LINEAR FUNCTIONS: With restricted domainsEXAMPLE : Graph with domain

0

2

4

6

8

−12

(0 )+44

3

2

1

0

−12

(2 )+4

−12

(4 )+4

−12

(6 )+4

−12

(8 )+4

4.2 CHECKING ORDERED PAIRS FOR A SOLUTION: GraphsEXAMPLE: Using your graph of from the warm up, check whether the following ordered pairs are solutions.

1.

2.

3.

4.

YES!

NO!

NO!

YES!

SOLUTIONS ARE ORDERED PAIRS FOUND ON THE LINE!

4.2 CHECKING ORDERED PAIRS FOR A SOLUTION: Equations

EXAMPLE: Check whether the following ordered pairs are solutions of the given equation.1.

a.

This means that point is not on the line

STANDARD FORM:

PRACTICE: b.

This means that point is on the line

4.2 CHECKING ORDERED PAIRS FOR A SOLUTION: Equations

PRACTICE: Check whether the following ordered pairs are solutions of the given equation.1.

STANDARD FORM:

2.

4.2 GRAPHING LINEAR EQUATIONS: Standard Form

EXAMPLE: Graph the equation

1. Solve for y.

2. Make a table by choosing values for x then finding y.

STANDARD FORM:

2. −2−1012

−3+2 (−2 )−7−5−3−11

−3+2 (−1 )−3+2 (0 )−3+2 (1 )−3+2 (2 )

4.2 SOLVING EQUATION IN STANDARD FORM

Solve for y for the following linear in equations in standard form.1. 2. 3.

STANDARD FORM:

4.2 SPECIAL GRAPHS: Horizontal and Vertical linesEXAMPLE: Graph and

−2−10

12

−𝟏−𝟏−𝟏

−𝟏−𝟏

𝒚=𝟐 𝒙=−𝟏

𝟐𝟐𝟐𝟐𝟐

−204

68

HORIZONTALLINE

VERTICALLINE

4.2 SPECIAL GRAPHS: Horizontal and Vertical linesPRACTICE: Graph and

−2−10

12

𝟔𝟔𝟔

𝟔𝟔

𝒚=−𝟑𝒙=𝟔

−𝟑−𝟑−𝟑−𝟑−𝟑

−204

68

FORMATIVE ASSESSMENT: In order to get your assignment for today, you must complete the following task. If you need help:

• First ask a fellow classmate• If you still cannot complete the task,

then as me for assistance.

• Once I have checked your task, I will give you the assignment for the day.

HOMEWORK #2:

Pg. 219: 1-33 odd

If finished, work on other assignments:

HW #1: Plotting points and graphing WS