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Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?

Find the slope intercept form of (-3,6) and (3,-6)