The general Graph
as shown below ( n, -4 to +4 ) can be noted that the general Shape
of the equation remains the same and the Y- intercept does not
change as the values of x changes. Note that all the minimum points
of the graph
are tangential to the line y =
-2 and as n changes, each graph generated by n, has two real roots.
Click Graphing Calc #3 for more exploration