Let's consider a code example showing what would be allowed (or not) using different levels of inheritance: 1  class BaseClass {}; void freeStandingFunction(BaseClass* b); class DerivedProtected : protected BaseClass { DerivedProtected() { freeStandingFunction(this); // Allowed } };
Definition of Horizontal Axis. Horizontal means flat or level. Horizontal axis is the x-axis on a graph. The blue number line in the figure below is the x-axis, the horizontal axis.
We can also have the situation where the axis of the parabola is horizontal: In this case, we have the relation: (not function) y 2 = 4px [In a relation, there are two or more values of y for each value of x. On the other hand, a function only has one value of y for each value of x.] The above graph's axis of symmetry is the x-axis. Example - Parabola with Horizontal Axis . Sketch the curve and find the equation of the parabola with focus (-2,0) and directrix x = 2. Show answer. Shifting the Vertex of a Parabola from the Origin