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anonymous

  • one year ago

What is the slope of the line that passes through the points (2, 8) and (6, 12)? A. –5 B. –1 C. 1 D. 5

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  1. Luigi0210
    • one year ago
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    Try using the slope formula: \(\Large m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \)

  2. anonymous
    • one year ago
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    i don't understand that

  3. Luigi0210
    • one year ago
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    \(\large (x_{1}, y_{1}) \) and \(\large (x_{2}, y_{2}) \) Match the coordinates with the formula \(\large (2, 8) ~~ (6, 12) \)

  4. anonymous
    • one year ago
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    OMG i don't understand what x1 y1 x2 y2 means

  5. MrNood
    • one year ago
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    the two point s oyu have are (x1,y1) and (x2,y2) in this case x1=2 y1=8 x2=6 y2=12 put those numbers into the formula that @Luigi0210 gave you m is the answer for the slope...

  6. anonymous
    • one year ago
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    wait so c?

  7. MrNood
    • one year ago
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    is that a guess? care to show a little of your working?

  8. anonymous
    • one year ago
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    (x1-x2) -------- (y1-y2) so 4/4=1. C.

  9. anonymous
    • one year ago
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    @MrNood Yes?

  10. MrNood
    • one year ago
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    good - that is correct |dw:1432832346785:dw|

  11. MrNood
    • one year ago
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    oooops |dw:1432832488643:dw|

  12. MrNood
    • one year ago
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    @ibacon BEWARE!! You have got the answer right in this case BUT you got the equation wrong You have the equation upside down (it is only correct here because it was 4/4) BE CAREFUL on other questions

  13. MrNood
    • one year ago
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    see @Luigi0210 first answer for the CORRECT formula

  14. anonymous
    • one year ago
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    What is the slope of the line that passes through the points (1, 7) and (–4, –8)? A. –3 B. Slope C. Irrational Numbers D. 3 so what is the x1 x2 y1 y2 and the equation? @Luigi0210 @MrNood

  15. MrNood
    • one year ago
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    you are given the 2 pairs of points you probably know they are in the order (x,y) in the brackets It doesn't matter which one you choose as 1 or 2 as long as you are consistent with the formula try it yourself the same as the last one

  16. anonymous
    • one year ago
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    okay. so.

  17. anonymous
    • one year ago
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    (y1- y2) =4 -------- (x1-x2) = -6 4 minus -6 = 10

  18. anonymous
    • one year ago
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    A. 1/3 B 3 C -1/3 D-3 10 is not here

  19. MrNood
    • one year ago
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    no sorry that is very wrong (x1,y1) = (1,7) (x2,y2) = (-4,-8) be careful with the signs when oyu do the subtraction

  20. anonymous
    • one year ago
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    i got it.

  21. anonymous
    • one year ago
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    correct me if im wrong

  22. anonymous
    • one year ago
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    (x1 -y1) =5 ------------ (x2 -y2) =15 5/15 = -3

  23. MrNood
    • one year ago
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    several errors: FIRSTS AND MOST IMPORTANT - you still hav eth eequation upside dowm it is y1-y2/x1-x2

  24. MrNood
    • one year ago
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    second 5/15 is not -3

  25. anonymous
    • one year ago
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    ik its 0.333 which is 1/3.

  26. MrNood
    • one year ago
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    let's start again (and look at my sketch from waaay above the vertical line is y2 - y1 so with you numbers what s y2 - y1?

  27. MrNood
    • one year ago
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    the horizontal line is x2-x1 so with your numbers what is x2-x1?

  28. anonymous
    • one year ago
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    -4 for the first y1 - y2

  29. anonymous
    • one year ago
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    and 6 for x1-x2

  30. MrNood
    • one year ago
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    no - that is not correct write out x1 = x2 = y1= x2=

  31. MrNood
    • one year ago
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    (x1,y1) = (1,7) (x2,y2) = (-4,-8)

  32. anonymous
    • one year ago
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    idek anymore

  33. MrNood
    • one year ago
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    Look - don't despair - this is mainly jjust about notation and numbers Go back to what we are trying ot find - the SLOPE of a straight line |dw:1432835712744:dw|

  34. anonymous
    • one year ago
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    its been an hour on 2 questions i give

  35. MrNood
    • one year ago
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    take ANY two points on the line: |dw:1432835788766:dw| Are you staying or going????

  36. anonymous
    • one year ago
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    i guess ill stay lol might as well

  37. anonymous
    • one year ago
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    what - what? if you give me numbers i will understand what x1 x2 y1 y2 is

  38. MrNood
    • one year ago
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    OK - now th eDEFINITION of the slope is the (change in y) ---------- (change in x) and that is shown in the drawing:|dw:1432835978112:dw| do you follow that?

  39. anonymous
    • one year ago
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    ohh 1- -4? ---------- 7 - -8

  40. MrNood
    • one year ago
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    YES those numbers are right BUT BUT BUT you GOTTA put the Y on top....

  41. anonymous
    • one year ago
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    7 minus -8 ---------- 1 minus -4

  42. MrNood
    • one year ago
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    correct and that equals???

  43. anonymous
    • one year ago
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    3..

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