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anonymous

  • one year ago

What is the slope-intercept form equation of the line that passes through (1, 3) and (3, 7)?

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  1. welshfella
    • one year ago
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    first find the slope of the line If the 2 points are (x1,y1) and (x2,y2) the slope is (y2-y1) / (x2-x1) here x1 = 1 , x2 = 3 , y1 = 3, y2 = 7

  2. welshfella
    • one year ago
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    so plug these into the formula and you can work out the slope can you do that?

  3. anonymous
    • one year ago
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    (7-3) / (3-1)

  4. anonymous
    • one year ago
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    4/2

  5. butterflydreamer
    • one year ago
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    That's correct :) now you want to simplify 4/2

  6. anonymous
    • one year ago
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    2

  7. anonymous
    • one year ago
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    @butterflydreamer

  8. anonymous
    • one year ago
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    I know Y=mx+b

  9. butterflydreamer
    • one year ago
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    yes! :) So your slope (m) = 2 Now, since we know m = 2, we need to write an equation in slope-intercept form: |dw:1433842091713:dw|

  10. anonymous
    • one year ago
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    so would it Y=2x+1?

  11. butterflydreamer
    • one year ago
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    well, Y = mx + b We know m = 2 and we can plug in the point (1,3) .. meaning x = 2, y = 3 to work out "b". 3 = 2 (1) + b 3 = 2 + b b = 1 So, y = 2x + 1 :)

  12. princeharryyy
    • one year ago
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    slope = (y2 - y1)/(x2-x1) where (x1,y1), (x2,y2) are the coordinates through which the line passes

  13. princeharryyy
    • one year ago
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    so, slope = (7-3)/(3-1) = 4/2 =2 ans @emilynicole1126

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