
Carol H. answered 09/22/17
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Experienced Mathematics Tutor w/ Master's Degree in Math
Let x = number of adult tickets sold
Let y = number of student tickets sold
4x + 3y = 600
If x = 0, y = 200
If y = 0, x = 150
That gives you two ordered pairs: (0,200) and (150,0)
Plot those points and connect them to give you a linear model.