Question 780185
 The tshirts sell $7 and the sweatshirts sell for $15. 
The band needs to raise $3000. 
Write a model that shows the number of tshirts and sweatshirts that must be sold.
 Then graph the model and determine three combinations of tshirts and sweatshirts that satisfy the model. 
:
Let x = no. of $15 sweatshirts
Let y = no. of $7 T-shirts
:
The equation
15x + 7y = 3000
Put in this form to graph
7y = -15x + 3000
y = {{{-15/7}}}x + {{{3000/7}}}
The graph
{{{ graph( 300, 200, -100, 300, -100, 500, (-15/7)x+(3000/7)) }}}
note that T-shirts are on the y axis, sweatshirts on the x axis
We have to deal with integers here
x=95, y =225
x=102, y=210
x=109, y=195
x=116, y=180