Writing Equations Pt1

Writing Equations

TSW write an equation in slope intercept from a given situation ​.

7.7A

Formula y = mx + b where m is the slope and b is the y-intercept.

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**If the y-intercept is negative you represent it using subtraction instead of addition.

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Slope- Intercept Form

**Remember the formula is ​y=mx+b

Turn and talk (2 minutes):

What is the slope(m) and y-intercept(b) in the above equation?

Multiple Choice

What is the slope in the equation?

• 3

• -2

• 2

• -3

Multiple Choice

What is the y-intercept in the equation?

• 3

• -2

• 2

• -3

The y-intercept is a given number that will never change.

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The slope depends on x amounts of something. ​

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y= 4x + 30

​Writing equations from a word problem.

Turn and Talk !

(3 minutes)​

With your group,

1. Read the problem.

2. Identify the slope.

3. Identify the y-intercept.

4. Write an equation in slope-intercept form.

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Multiple Choice

What is the slope ??

• $40

• $20

• $2

• $80

Multiple Choice

What is the y-intercept ??

• $40

• $20

• $2

• $80

Multiple Choice

Write an equation for the problem in slope-intercept form.

• y=40x+2

• y=2x+40

Open Ended

Read the problem and type the answer that best fit the question.