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22 June, 15:55

When the Senior class decided to order T-shirts, they were quoted a price of $7.50 per shirt plus a setup fee. The total cost for 300 shirts was $2,450. Write an equation in the form y = mx + b that represents the cost, y, for x shirts.

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  1. 22 June, 16:00
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    y=7.5x+200 because if you multiply 7.5 and 30 you get 2250 where you can see 200 is the setup fee. You can then plug it into an equation.
  2. 22 June, 16:13
    0
    7.5s+f=c we are told that c=2450 when s=300 so

    7.5 (300) + f=2450

    2250+f=2450

    f=200

    So the y-intercept is 200 and our slope is 7.5 so:

    y=7.5x+200
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