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maddy21

  • 3 years ago

slope intercept form the equation of the line passing through the points (2.3) (-4.5)

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  1. campbell_st
    • 3 years ago
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    can you find the slope of the line..?

  2. maddy21
    • 3 years ago
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    yes

  3. campbell_st
    • 3 years ago
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    ok... so what did you get for the slope...?

  4. maddy21
    • 3 years ago
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    |dw:1359752467738:dw|

  5. campbell_st
    • 3 years ago
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    ok... so the slope intercept form of a line is y = mx + b m is the slope and b is the y- intercept simplifying the slope it becomes - 1/3 so you have y = -1/3 x + b pick either point.... and substitute it into the equation to find b. if you choose (2, 3) substitute x = 2 and y = 3 into the equation and solve for b so 3 = -1/3 (2) + b can you do that..?

  6. maddy21
    • 3 years ago
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    ill try

  7. campbell_st
    • 3 years ago
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    try and leave your answer as a fraction

  8. campbell_st
    • 3 years ago
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    oops... it will be a mixed number... for b

  9. maddy21
    • 3 years ago
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    |dw:1359752864385:dw|

  10. maddy21
    • 3 years ago
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    hehe i think im wrong

  11. campbell_st
    • 3 years ago
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    ok... so simplified the slope |dw:1359753073245:dw| so what do you think the equation is given the slope is -1/3 and b = 3 2/3

  12. maddy21
    • 3 years ago
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    how did u get 1/3?

  13. campbell_st
    • 3 years ago
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    you said the slope is -2/6 which is the same as - 1/3 take out the common factor of 2 so your equation is \[y = \frac{-1}{3} x + 3 \frac{2}{3}\]

  14. maddy21
    • 3 years ago
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    i thought its 11/3

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