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anonymous

  • one year ago

I think I have the answer but I'm not sure. Please help! I'll give a medal or whatever else. Part A: What is the approximate y-intercept of the line of best fit and what does it represent? (5 points) Part B: Write the equation for the line of best fit in slope-intercept form and use it to predict the number of games that could be won after 13 months of practice. (5 points) picture here: http://prntscr.com/7jf9c6

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  1. anonymous
    • one year ago
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    For part A I have the y-intercept as 1 and it represents the number of games won. I just need help with part B :)

  2. triciaal
    • one year ago
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    Y-intercept when x =0

  3. triciaal
    • one year ago
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    The number of games won without practicing

  4. triciaal
    • one year ago
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    The line of best fit Find the slope

  5. triciaal
    • one year ago
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    For any (x y) slope-intercept form Y = m x + b where m is the slope and b = y-intercept

  6. triciaal
    • one year ago
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    Part. C. Find y when x = 13

  7. anonymous
    • one year ago
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    I'm having a hard time finding the slope because of where the points lie. The rise/run method isn't really working for me here. Can you help explain it? I can't figure it out

  8. anonymous
    • one year ago
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    @triciaal I think the slope is 1? Because it's 4 over 4 which simplifies to 1. Would you agree or disagree?

  9. anonymous
    • one year ago
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    Anyone still here?

  10. triciaal
    • one year ago
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    Responding elsewhere

  11. anonymous
    • one year ago
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    No worries. Take your time, I just wanted to make sure I wasn't alone haha

  12. triciaal
    • one year ago
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    Let me get to the PC so I can use the draw. Easier for me than this Ipad

  13. anonymous
    • one year ago
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    That's fine! Thank you

  14. triciaal
    • one year ago
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    finally here

  15. triciaal
    • one year ago
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    |dw:1434859950040:dw|

  16. triciaal
    • one year ago
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    look at your graph find 2 point (x1, y1) and (x2, y2) plug into the formula and compute m

  17. triciaal
    • one year ago
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    |dw:1434860135452:dw|

  18. triciaal
    • one year ago
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    take a sec to look at this it has a lot but follow the colors. let me know if you still have any questions about the slope before we continue

  19. anonymous
    • one year ago
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    Okay cool, I figured out how to write it in slope format. basically it's y = m(slope)x + b (y-intercept) ? Was my original y-intercept right ? And this case it'd just be y = x + y-intercept because it's 0, am I right?

  20. triciaal
    • one year ago
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    |dw:1434860827792:dw||dw:1434860984600:dw||dw:1434861025557:dw|

  21. anonymous
    • one year ago
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    Ohhh!!! I had it literally backwards. Do you mind if I save these pictures so I can use them in the future if I need help with problems like this?

  22. triciaal
    • one year ago
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    not very neat but yes you can keep! notice my first response the independent variable is the time spent practicing, the controlled variable, the input, x the number of games won changes. it depends on the amount of practice

  23. triciaal
    • one year ago
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    notice the points I used are the ones actually on the line--best fit

  24. triciaal
    • one year ago
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    for these remember the variable you control is your x and what is dependent is your y b is the y-value when x = 0.

  25. anonymous
    • one year ago
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    Haha, I'm literally saving all of this. You've honestly helped so much

  26. triciaal
    • one year ago
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    great. all the best with your studies.

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