X-3(2x-7)=76. multi-step equations

Which equation matches the graph shown ?

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

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?