Math Lesson 3.6 Notebook With Answers - 8th Grade, 2015 printable pdf download

Math Lesson 3.6 Notebook With Answers - 8th Grade, 2015

8thMathLesson3.6.notebook

November 11, 2015

Bell Ringer Answer

Bell Ringer

1)State the x‐ and y‐intercepts of the equaon and

1) x – intercept: 12

then use the intercepts to graph the equaon:

y – intercept: 8

2x + 3y = 24

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Sec. 3.5 HW Answers Pg. 213

1) x‐int: 3.5 y‐int: 7

2) x‐int: ‐4 y‐int: 3

3) x‐int: 1.25 y‐int: 1.66

4) The x‐int. of 120 means the store could buy 120 jeans and no

khakis.

The y‐int. of 90 means the store could buy 90 khakis and no

jeans.

Lesson 3.6 Write Linear Equaons

5) The x‐int. of 375 means the zoo could have 375 4‐legged animals

and no 2‐legged animals. The y‐int. of 750 means the zoo could

have 750 2‐legged animals and no 4‐legged animals.

7) Aer 3x = 12, Carmen didn’t divide both sides by 3 to get the x‐

int. of 4.

9) D

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Point‐slope Form: equaon of a line in the form y – y

= m (x – x

)

where

Steps for Writing Linear Equations

) is a point on the line and m is the slope of the line.

1 ,

Example: Write an equaon in point‐slope form and slope‐

If you have:

Then you do this:

intercept form for the line that passes through (‐1, 2) and has a

Substitute slope for m and point

1)Slope and a point

(x1 , y1) into yy1 = m(x x1).

slope of ‐1/2 .

Substitute slope for m and yint.

2)Slope and yintercept

for b in y=mx + b.

Find yint. b and slope m from

3)Graph

graph and substitute into y=mx +

Use slope formula and points to

find slope m. Substitute slope for

4)2 points

m and 1 of the points intoyy1 =

m(x x1).

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Math Lesson 3.6 Notebook With Answers - 8th Grade, 2015

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