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anonymous

  • one year ago

I'm doing Algebra II virtual school. I've asked my teacher and tutors about these types of question and they cannot provide a sufficient answer. Please someone help me figure this out I would greatly appreciate it. A sample problem or hints would be nice, I do not want the answer I simply want to know how to approach the problem. The resistance (R) in a wire increases when the length of the wire (L) increases. Write the correct equation for this scenario, and solve for when the length is 1. Length I Resistance ------------ 10 I 2 ------- 15 I 3

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  1. anonymous
    • one year ago
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    R increases as L increases, so R is dependent on L. R → dependent variable L → independent variable You can write the given data as points in the form (L, R). The points are (10, 2) and (15, 3)

  2. anonymous
    • one year ago
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    You can use two points to write the equation of the line. Start by finding the slope. Do you know the formula and how to use it?

  3. anonymous
    • one year ago
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    yes y2-y1/x2-x1

  4. anonymous
    • one year ago
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    right. What did you get for slope?

  5. anonymous
    • one year ago
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    1/5

  6. anonymous
    • one year ago
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    so use point slope then solve for b by pluging in a point?

  7. anonymous
    • one year ago
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    yes.

  8. anonymous
    • one year ago
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    here maybe you will understand my confusion if I give you the possible answers

  9. anonymous
    • one year ago
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    because I did that and my answers aren't remotely close to the possible answers.. Ty for your help btw I really appreciate it :)

  10. anonymous
    • one year ago
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    R = 20 over L; R = 20 R = .2L; R = 5 R = .2L; R = .2 R = 20 over L; R = 5

  11. anonymous
    • one year ago
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    what did you get for your b?

  12. anonymous
    • one year ago
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    1/5 is the same as 0.2, so the slope is correct

  13. anonymous
    • one year ago
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    8

  14. anonymous
    • one year ago
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    not sure where you went wrong. b should be 0

  15. anonymous
    • one year ago
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    oh now I see i added instead of subtracting in one of my steps lol

  16. anonymous
    • one year ago
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    so just plug 1 into y=.2x and I get the correct answer?

  17. anonymous
    • one year ago
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    yes, plug 1 in for y

  18. anonymous
    • one year ago
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    Got it ! Thank you so much!! :).. Ima have to tell my teachers that peachpi is a better teacher then them haha

  19. anonymous
    • one year ago
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    lol. wait until after you're done with the class ;)

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