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anonymous

  • 5 years ago

In 1977, the price of a scientific calculator was $175. In 2004, the price was $15. Assuming the change in price was linear, what was the approximate price of a scientific calculator in 1998? $23.00 $27.00 $51.00 $60.00

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  1. anonymous
    • 5 years ago
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    Is 1977 year 0 or year 1?

  2. anonymous
    • 5 years ago
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    51

  3. anonymous
    • 5 years ago
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    1977 is year 0. since it's Initial value.

  4. anonymous
    • 5 years ago
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    omg i love you guyss, (: thanks so much, 25 more questions all most done (:

  5. anonymous
    • 5 years ago
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    lol

  6. anonymous
    • 5 years ago
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    Bailey Nae try solving them your self at first. otherwise you will not gett anything.

  7. anonymous
    • 5 years ago
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    i do, i try them 1st Lol i just keep gettin the answers wrong and call me nae hun (:

  8. anonymous
    • 5 years ago
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    okay this is a y of 2 minus y of 1 over x of 2 - x of 1 type of problem. Solve the equation of the line. Your x value is the year and the y value is the $$. The two points on the line are (0,175) and then (27, 15) Does this make sense so far?

  9. anonymous
    • 5 years ago
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    yea

  10. anonymous
    • 5 years ago
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    175 - 15 = 160 0-27 = 27 160/27 is the slope of the line (M in the equation y =mx+b)

  11. anonymous
    • 5 years ago
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    Since you have the y values, and the slope all you need to do now is solve for the x values

  12. anonymous
    • 5 years ago
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    so its 27?

  13. anonymous
    • 5 years ago
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    160/27 is the slope of the line in the equation y=mx+b. you started with two points on the line and needed to find the equation of the line so that you can solve for the rest of the questions. So step one is to find the equation of the line y=160/27x + b Now, plug in the y values one at a time and solve for X.

  14. anonymous
    • 5 years ago
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    Taking a look at the first one ($23.00) y= $23.00 23 = 160/27x + b

  15. anonymous
    • 5 years ago
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    so it 23?????????? im confused

  16. anonymous
    • 5 years ago
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    Okay... how familiar are you with solving an equation of a line given two points on the line? I will explain step by step but need to know where to begin

  17. anonymous
    • 5 years ago
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    http://www.purplemath.com/modules/slopgrph.htm

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