Write a linear equation (working the fractions)

Write a linear equation (working the fractions)

By Elizabeth Stoddard

First start with the Point Slope Form.

​Some text here about the topic of discussion.

Multiple Choice

What is the Point Slope Form?

• m=y₂-y₁

  x₂-x₁

• y=mx+b

• Ax+By=C

• y-y₁=m(x-x₁)

Multiple Choice

To write the equation of the line that passes through (-1,-4) and (2,0), first...

• plug into point slope form

• graph the dots

• plug into slope intercept form

• plug into slope formula

Multiple Choice

Plug into slope formula m=y₂-y₁

x₂-x₁

(-1,-4) (2,0). Which one is correct?

• 0-4 = 0

  2-1

• 2+1 = 3

  0+4 4

• 0+4 = 4

  2+1 3

• 0-4 = -4

  2+1 3

Multiple Choice

Use the slope that you just got, m=4

3

use the first point (-1,-4)

• y - 1 = 4 (x - 4)

  3

• y + 1 = 4 (x + 4)

  3

• y + 4 = 4 (x + 1)

  3

• y - 4 = 4 (x - 1)

  3

Multiple Choice

Next distribute

y + 4 = 4 (x + 1)

3

• y + 4 = 4 x + 1

  3

• y + 4 = 4 x + 4

  3

• y + 4 = 4 x + 3

  3

• y + 4 = 4 x + 4

  3 3

Multiple Choice

y + 4 = 4 x + 4

3 3

What is the next step?

• add 4

• subtract 4

• multiply by 3

• divide by 3

Multiple Choice

When you subtract 4, since there is a fraction, you need to get the same ________

• answer

• quotient

• numerator

• denominator

Multiple Choice

y + 4 = 4 x + 4

3 3

Subtract 4, which represents 4 with the same denominator?

• 4

  1

• 16

  3

• 4

  3

• 12

  3

Multiple Choice

y + 4 = 4 x + 4

3 3

-4 -12

3

• y = 4 x + 8

  3 3

• y = 4 x - 8

  3 3

• y = 4 x + 16

  3 3

• y = 4 x 16

  3 3