write the equation of the line passing through (1, 3) and...

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Lesson 6.6 2015.notebook 1 June 27, 2017 Dec 152:04 PM Write the following line in slope yint form: Write the equation of the line passing through (1, 3) and (4, 5) in point slope form.

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Page 1: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

1

June 27, 2017

Dec 15­2:04 PM

Write the following line in slope y­int form:

Write the equation of the line passing through (­1, 3) and (4, ­5) in point slope form.

Page 2: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

2

June 27, 2017

Jan 1­2:26 PM

These two equations are equivalent and represent the linear function below.

In which form is

each equation

written

Let's rearrange the slope­intercept form of the equation

General Form Ax + By + C = 0

where A, B, and C are integers andA is positive

Page 3: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

3

June 27, 2017

Jan 1­2:58 PM

Page 4: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

4

June 27, 2017

Jan 1­3:15 PM

Everyone take 4 Post­it note pieces of paper.

Write an example of an equation in slope intercept form on your first Post­it note.

Write an example of an equation in slope point form on your second Post­it note.

Write an example of an equation in standard form on your third Post­it note.

Write an example of an equation in general form on your last Post­it note.

Put your equations under the proper category on the board.

Page 5: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

5

June 27, 2017

Dec 13­8:08 AM

6.6 General Form

Slope Y­Intercept Form        y = mx + bPoint Slope Form                    y ­ y1 = m(x ­ x1)

General Form ax + by + c = 0

In general form, a, b and c must be integers (no fractions or decimals allowed)

The order of the term is important....x must be first, then y followed by the constant.  

We always try and keep the coefficient of "a" positive ­ this helps us determine which side of the equation ALL terms must be on.

Page 6: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

6

June 27, 2017

Dec 13­8:13 AM

Write the following in general form:

y = 2x ­ 4     2y = ­3x + 2

y = 1/2 x + 2 y ­ 3 = 2/3(x ­ 4)

Page 7: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

7

June 27, 2017

Jan 1­3:36 PM

Ex(1) Write each equation in general form.

(a)   (b)     (c)

Page 8: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

8

June 27, 2017

Jan 1­3:38 PM

Ex(2) Determine the slope of each linear function.

(a)   (b)     (c)

Would you be able to graph each of these linear functions?

Page 9: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

9

June 27, 2017

Dec 13­8:31 AM

Finding X and Y intercepts

X Intercepts

1. set y = 0

2. solve for x

3. write as ordered pair

           (__, 0)

Y Intercepts

1. set x = 0

2. solve for y

3. write as ordered pair

         (0,__)

ex: y = 2x + 4

Page 10: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

10

June 27, 2017

Dec 13­8:35 AM

Find the equation of the line in general form if:

1.  the line is parallel to 2x ­ 3y = 7 and has the same x intercept as the line 2x + 4y = 2.

Page 11: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

11

June 27, 2017

Dec 15­4:05 PM

Find the x and y intercepts for the line 2x ­ 4y ­ 12 = 0

Find the equation of a line that is perpendicular to 2y ­ x = 6 and has the same x intercept as 4x + 2y ­ 8 = 0

Page 12: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

12

June 27, 2017

Dec 13­8:36 AM

(Special cases)

2.  A line parallel to y = 7 and through the point (4, ­2)

3.  A line perpendicular to y ­ 2 = 3 and through (2, ­1)

Page 13: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

13

June 27, 2017

Jan 1­3:42 PM

Ex(3) Determine the x and y intercept of the linear function.

Would you now be able to graph this linear function?

Page 14: Write the equation of the line passing through (1, 3) and ...toshmath421a.weebly.com/uploads/4/3/1/8/43188271/day_6_-_6.6.pdf · Lesson 6.6 2015.notebook 5 June 27, 2017 Dec 138:08

Lesson 6.6  2015.notebook

14

June 27, 2017

Jan 1­3:49 PM

HOMEWORK QUESTIONSPAGES 384-385

DO #'S: 4, 5a,b, 6a,c, 7, 9a,b, (omit iii for these questions)

13, 14, 18, 22, 24.