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If I were to start with $50 and add $20 each week for 12 weeks, what is an equation that represents the relationship between the dollar amount and the number of weeks?

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Answer:

This is a function y = mx + b:

  • You start with $50, so the y-intercept(b) is 50.
  • Adding $20 a week means that the slope(m) is 20.

So, the function would be y = 20x + 50, where y is the dollar amount after x weeks and x cannot be greater than 12.

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