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itsjustme_lol

  • 3 years ago

Change the given equation into slope-intercept form. 4x – 3y = -12

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  1. jiji501
    • 3 years ago
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    Do you know the equation for the slope-intercept form?

  2. itsjustme_lol
    • 3 years ago
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    no this is a pretest so i havent learned it exactly yet

  3. jiji501
    • 3 years ago
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    Ok!

  4. jiji501
    • 3 years ago
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    The slope-intercept form is: y= ax+b

  5. jiji501
    • 3 years ago
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    As you can see, we're trying to isolate the y on one side and bring everything else to the other.

  6. jiji501
    • 3 years ago
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    The y is also positive and has only one of them ( So there is not 2y = ax + b for example)

  7. itsjustme_lol
    • 3 years ago
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    ok

  8. itsjustme_lol
    • 3 years ago
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    im still confused

  9. jiji501
    • 3 years ago
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    Let's do it step by step. Can you make your y by itself? (Bring the x over)

  10. itsjustme_lol
    • 3 years ago
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    ok. and no, i dont know how to do any of it. Im new to this kind of stuff and its confusing lol

  11. jiji501
    • 3 years ago
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    I'll give you a simple equation x + 1 = 5

  12. jiji501
    • 3 years ago
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    Would it be mathematically correct to say that x = 4? Because x+1-1 = 5-1

  13. itsjustme_lol
    • 3 years ago
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    yes

  14. jiji501
    • 3 years ago
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    Exactly! So it is the same thing here but we add something harder. We have to move variables to the other side as well!

  15. jiji501
    • 3 years ago
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    4x -3y = 12 Would it be correct to say that 4x-4x-3y = 12-4x ???

  16. jiji501
    • 3 years ago
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    So -3y = 12-4x?

  17. itsjustme_lol
    • 3 years ago
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    ok but whats next?

  18. itsjustme_lol
    • 3 years ago
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    -3/2?

  19. jiji501
    • 3 years ago
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    Well as you can see, we've already isolated the y. What we want to do is get only one y and to make it positive.

  20. jiji501
    • 3 years ago
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    How do we get rid of the -3 in front of y?

  21. itsjustme_lol
    • 3 years ago
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    divide it by 3?

  22. jiji501
    • 3 years ago
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    By -3, close ;)

  23. jiji501
    • 3 years ago
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    So now... y = ?

  24. itsjustme_lol
    • 3 years ago
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    1

  25. jiji501
    • 3 years ago
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    Well there is one y but I mean what is on the other side of y

  26. jiji501
    • 3 years ago
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    what is 12/-3 and -4x/-3

  27. itsjustme_lol
    • 3 years ago
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    -4 is the first one, the other us a decimal 1.33 repeating

  28. jiji501
    • 3 years ago
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    Correct. You could also leave it as a fraction.

  29. jiji501
    • 3 years ago
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    So y = 4/3x -4

  30. jiji501
    • 3 years ago
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    That would be your answer. 4/3 is the slope and -4 is the y-intercept

  31. pottersheep
    • 3 years ago
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    It has to be in y = mx + b form

  32. itsjustme_lol
    • 3 years ago
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  33. itsjustme_lol
    • 3 years ago
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    so it would be D?

  34. jiji501
    • 3 years ago
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    We just did it together....y = 4/3x -4

  35. jiji501
    • 3 years ago
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    You said it yourself.... -4!!!

  36. itsjustme_lol
    • 3 years ago
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    lol. sorry i meant C. thankyouuuu

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