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AGummiBear55

  • 3 years ago

How do I put this into slope intercept form? (2, 120) (4, 240) 120-240/2-4 =60

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  1. campbell_st
    • 3 years ago
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    well thats the slope m the point slope form of a line is y = mx + b m = slope and b = y-intercept to calculate b, choice a point say (2, 120) and substitute into y = 60x + b to find the value of b when you have done that you'll have your line in point slope form.

  2. AGummiBear55
    • 3 years ago
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    I did that and this is what I get: y=mx+b 120=60(2)+b 120=120+b 0=b ?? I'm just confused.

  3. campbell_st
    • 3 years ago
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    thats correct so whats th equation of the line..?

  4. campbell_st
    • 3 years ago
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    remember its y = mx + b you've found m = 60 and b = 0 just substitute for the equation

  5. AGummiBear55
    • 3 years ago
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    ??? I don't know... so... y = 60x + 0 ????

  6. AGummiBear55
    • 3 years ago
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    or is it just y=60x ??? Thank you for your help, by the way, :)

  7. campbell_st
    • 3 years ago
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    thats it.... to check its correct use the other point (4, 240) subsitiute x = 4 and you should get y = 240

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