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nagdy1 Group Title

What is an equation for the line that passes through points (–1, –4) and (1, 4)? Write the equation in slope-intercept form. PLEASE SHOW STEP BY STEP

  • one year ago
  • one year ago

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  1. philo1234 Group Title
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    First find the slope using the 2 point can you do that?

    • one year ago
  2. nagdy1 Group Title
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    yes

    • one year ago
  3. philo1234 Group Title
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    What did you get?

    • one year ago
  4. nagdy1 Group Title
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    zero slope or unidentified slop

    • one year ago
  5. philo1234 Group Title
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    \[slope = \frac{ 4-(-4) }{ 1-(-1) }\]

    • one year ago
  6. nagdy1 Group Title
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    that's all

    • one year ago
  7. philo1234 Group Title
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    Nope you then need to use this slope and one of the points to find the equation. plug in this formula y-y1=m(x-x1) (x1,y1) is taken from one of the points

    • one year ago
  8. nagdy1 Group Title
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    ok then what

    • one year ago
  9. nagdy1 Group Title
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    i dont get my head is about to explode they gave me this question out of no where

    • one year ago
  10. nagdy1 Group Title
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    can u show me step by step

    • one year ago
  11. philo1234 Group Title
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    So what do you have so far? m (slope)=4, choose the point (1,4), x1=1, y1=4 you should have y-4=4(x-1)

    • one year ago
  12. nagdy1 Group Title
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    can you please just put all the steps on one reply like: 1. 2. 3. 4.

    • one year ago
  13. philo1234 Group Title
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    Step 1: Find the slope(m) = (4-(-4))/(1-(-1)) = 8/2=4

    • one year ago
  14. nagdy1 Group Title
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    ok step 2

    • one year ago
  15. philo1234 Group Title
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    Step 2: Use point slope form to get equation: y-y1=m(x-x1), m=4, point (1,4) where x1=1, y1=4 In the point-slope equation: y-1=4(x-4) Do u understand these step so far?

    • one year ago
  16. nagdy1 Group Title
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    yes

    • one year ago
  17. philo1234 Group Title
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    Step 3: Slope-intercept form is y=mx+b So we have y-1=4(x-4) Solve for y (that is put y by itself on one side).

    • one year ago
  18. philo1234 Group Title
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    If you did that correctly you should get: y=4x-15

    • one year ago
  19. nagdy1 Group Title
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    ohhh thanks man

    • one year ago
  20. nagdy1 Group Title
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    ill give u a medal

    • one year ago
  21. philo1234 Group Title
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    Sure no problem.

    • one year ago
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