math
posted by alex .
When the Senior class decided to order Tshirts, 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.

Here
m=7.50 / shirt
b=setup fee
Since we know that
2450=7.5(300)+b
=>
b=24507.50*300
=24502250
=200
So
y=7.50x+200 
Write an equation in the form y = mx + b for the line that passes through the point(5, 1) and has a slope of 2.
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