Solve really stuck much appreciated

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

Which is the graph of this function 3 square root of x plus one if