Calculate his certainty equivalent?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Graph the line with the given slope m and y-intercept b. m=-3,b=1

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?