Please I need someone to help my assignment.​

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.