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anonymous

  • one year ago

Eric has a gift card to his favorite restaurant. Every Tuesday he has the same meal at the restaurant. What is the equation that represents Eric’s gift card balance? Record any fractional answers in decimal form. (y – 100) = ? (x – ?) Eric’s Gift Card Weeks 2 4 6 8 Balance $125 $100 $75 $50

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  1. anonymous
    • one year ago
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    @butterflydreamer

  2. butterflydreamer
    • one year ago
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    find the slope firstly. these are your points basically : (2, 125) , (4, 100) , (6, 75) , (8, 50) So pick any of the two points and then use m = y2 - y1/ x2 - x1 to find the slope

  3. anonymous
    • one year ago
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    okay

  4. butterflydreamer
    • one year ago
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    yeep, so tell me when you find what m = ? :)

  5. butterflydreamer
    • one year ago
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    so like let's use these two points: |dw:1436369113331:dw|

  6. butterflydreamer
    • one year ago
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    ...

  7. anonymous
    • one year ago
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    -25/2

  8. anonymous
    • one year ago
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    @butterflydreamer

  9. butterflydreamer
    • one year ago
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    correct! but the question tells you to change fractions to decimals

  10. anonymous
    • one year ago
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    -12.5?

  11. anonymous
    • one year ago
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    so m= -12.5?

  12. butterflydreamer
    • one year ago
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    good ^_^. so, m = -12.5 Now we have to look back at the point-slope formula: \[y - y_1 = m ( x - x_1) \] we know that: |dw:1436369770454:dw| so we know m = -12.5 , x1 = 4, y1 = 100 so plug these values into the point-slope formula and you'll get your answer :)

  13. anonymous
    • one year ago
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    \[y-100=-12.5(x-4)\]

  14. butterflydreamer
    • one year ago
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    yippeeee~ Fantastic job :)!

  15. anonymous
    • one year ago
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    Yay! Thank You So Much! :)

  16. butterflydreamer
    • one year ago
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    no problemooooooo :D!

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