If you mean a parabola with a maximum point then it will look like an umbrella.
It is either a maximum or minimum value depending on its downwards shape or its upwards shape
A parable.
It is a parable because it is used to prove a point. In this case, it is used to show that greed won't get you anything.
A quadratic function can only have either a maximum or a minimum point, not both. The shape of the graph, which is a parabola, determines this: if the parabola opens upwards (the coefficient of the (x^2) term is positive), it has a minimum point; if it opens downwards (the coefficient is negative), it has a maximum point. Therefore, a quadratic function cannot exhibit both extreme values simultaneously.
The vertex, or maximum, or minimum.
The first laborers insisted upon a denarius for the day and no contract was made with the rest of the laborers - the chief point of the parable.
In this parable it means all who hear the word of god , need not be saved as they may reject the gift of salvation, through gods word.
The slope of the tangent line at the maximum point of the curve is zero. So we say that as a curve point approaches to the maximum point, the slope of the tangent line at that point approaches to zero.
Such a point is usually referred to as a 'trough' in economics, due to the shape of a graph indicating the high and low points of an economy (typically by GDP, etc).
The point on the parabola where the maximum area occurs is at the vertex of the parabola. This is because the vertex represents the maximum or minimum point of a parabolic function.
There are nine parables in the Gospel of Mark: the parable of the sower, the parable of the lamp, the parable of the growing seed, the parable of the mustard seed, the parable of the wicked tenants, the parable of the fig tree, the parable of the wedding feast, the parable of the ten virgins, and the parable of the talents.
Parables are usually fictional stories with a spiritual lesson contained within them. Lectures are the presentation of information. However, a lecture may well contain a parable in order to illustrate a point.