TODAY IN ALGEBRA…

Warm up: Writing an equation of a line given two points

Learning Goal: 5.2 You will write an equation of a line in slope-intercept form given two points

Independent Practice

WARM UP: Write an equation of the line has the given function values.

1. Rewrite function values as coordinate pairs (points).

2. Calculate slope:

3. Find y-intercept :

4. Write equation in function notation.

8−2−3−0

𝑥 𝑦 𝑥 𝑦

−4 −1

REMEMBER:

𝑚→𝑏→

5.2 CALCULATING THE Y-INTERCEPT: Given a point and slope.Write an equation of the line that passes through the point and has a slope of .

1. Find slope: 2. Calculate the y-intercept:

GIVEN!!!!!

−4−1

𝑥𝑦

2 −9

REMEMBER:

𝑚→𝑏→

5.2 CALCULATING THE Y-INTERCEPT: Given a point and slope.PRACTICE: Write an equation of the line that passes through the point and has a slope of .

1. Find slope: 2. Calculate the y-intercept:

GIVEN!!!!!

2−9

𝑥𝑦

1 −3

REMEMBER:

𝑚→𝑏→

5.2 CALCULATING SLOPE AND Y-INTERCEPT: Given 2 points.Write an equation of the line that passes through the given points:

(−𝟐 ,−𝟓 ) , (𝟐 ,−𝟏)1. Calculate slope:

2. Calculate the y-intercept:

−1−(−5)2−(−2) 1

−3

𝑥 𝑦

−1 −1

REMEMBER:

𝑚→𝑏→

5.2 CALCULATING SLOPE AND Y-INTERCEPT: Given 2 points.PRACTICE: Write an equation of the line that passes through the given points:

(𝟏 ,−𝟐 ) ,(−𝟓 ,𝟒)1. Calculate slope:

2. Calculate the y-intercept:

4−(−2)−5−1 −1

−1

𝑥 𝑦

𝑓 (𝑥)=𝑥+¿ 6

REMEMBER:

𝑚→𝑏→

Write an equation for the linear function with the values and

(−𝟐 ,𝟏𝟎 ) ,(𝟒 ,−𝟐)

−26

5.2 CALCULATING SLOPE AND Y-INTERCEPT: Given 2 points.

1. Calculate slope:

2. Calculate the y-intercept:

𝑥 𝑦−2−104−(−2)

HOMEWORK #3:

Pg. 296: 3-7, 11-14, 22-25

If finished, work on other assignments:

HW #1: Pg. 286: 3-23 allHW #2: Pg. 286: 24-38 all