anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@butterflydreamer
butterflydreamer
  • butterflydreamer
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
anonymous
  • anonymous
okay

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butterflydreamer
  • butterflydreamer
yeep, so tell me when you find what m = ? :)
butterflydreamer
  • butterflydreamer
so like let's use these two points: |dw:1436369113331:dw|
butterflydreamer
  • butterflydreamer
...
anonymous
  • anonymous
-25/2
anonymous
  • anonymous
@butterflydreamer
butterflydreamer
  • butterflydreamer
correct! but the question tells you to change fractions to decimals
anonymous
  • anonymous
-12.5?
anonymous
  • anonymous
so m= -12.5?
butterflydreamer
  • butterflydreamer
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 :)
anonymous
  • anonymous
\[y-100=-12.5(x-4)\]
butterflydreamer
  • butterflydreamer
yippeeee~ Fantastic job :)!
anonymous
  • anonymous
Yay! Thank You So Much! :)
butterflydreamer
  • butterflydreamer
no problemooooooo :D!

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