What does the graph of an equation reveal about the solutions to the equation?

Josephine has a great garden with and area of 2x2 + x - 6 square feet

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)