Find the rate of change from the given table

Which graph represents the equation y =4x

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a

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?