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Pre Algebra

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Suppose you have an after school baby sitting service. You charge a flat fee of $10 per week plus $3 per hour. The equation y = 3x + 10 represents your earnings per week for one child.

Describe the y intercept.

Answer: The y intercept is (0,10) but I'm unsure how to describe. I assume no hours were worked (X=0)....but I can't reconcile the $10 charge.


  • Pre Algebra -

    The $10 dollar charge is the Y-intercept (0,10). Meaning that would be the starting point on your graph in $. Then for every hour worked its an extra 3 dollars, so rise over run 3 over 1. Which would mean every hour worked (x-axis) would juust increase by three.

  • Pre Algebra -


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