# What is a parabola graph equation?

## What is a parabola graph equation?

Key Takeaways. The graph of any quadratic equation y=ax2+bx+c y = a x 2 + b x + c , where a, b, and c are real numbers and a≠0 a ≠ 0 , is called a parabola. When graphing parabolas, find the vertex and y-intercept. If the x-intercepts exist, find those as well.

How do you find the equation of a parabola?

The general equation of a parabola is: y = a(x-h)2 + k or x = a(y-k)2 +h, where (h,k) denotes the vertex. The standard equation of a regular parabola is y2 = 4ax.

### What do you mean by parabola?

Definition of parabola 1 : a plane curve generated by a point moving so that its distance from a fixed point is equal to its distance from a fixed line : the intersection of a right circular cone with a plane parallel to an element of the cone. 2 : something bowl-shaped (such as an antenna or microphone reflector)

What is a parabola Class 10?

A parabola is a U-shaped plane curve where any point is at an equal distance from a fixed point, which is the focus, and from a fixed straight line, which is known as the directrix. The set of all points in a plane that are equidistant from a fixed line and a fixed point in the plane is a parabola.

## What is the focus of parabola?

A parabola is set of all points in a plane which are an equal distance away from a given point and given line. The point is called the focus of the parabola and the line is called the directrix. The focus lies on the axis of symmetry of the parabola.

What is parabola in engineering drawing?

The parabola is a conic section, the intersection of a right circular conical surface and a plane to a generating straight line of that surface.

### How many points define a parabola?

Two degrees of freedom are used to specify that point. Use two more to determine the line which is the directrix. You can do that with one more point if you take the directrix to be the line through that point perpendicular to the line joining the two points. Thus, you can use two points to define a parabola.

What is parabola definition and example?

The definition of a parabola is a symmetrical plane curve that forms when a cone intersects with a plane parallel to its side. A u-shaped graph of a quadratic function is an example of a parabola. noun.

## What is parabola polynomial?

A parabola is the graph of a quadratic polynomial in one variable (see more in the Polynomials section). Its general equation comes in three forms: The key information in drawing a parabola is the vertex, which we can read off from the vertex form equation as the point . If , the parabola opens upwards.

How do you write an equation for a parabola graph?

We can use the vertex form to find a parabola’s equation. The idea is to use the coordinates of its vertex (maximum point, or minimum point) to write its equation in the form y=a(x−h)2+k (assuming we can read the coordinates (h,k) from the graph) and then to find the value of the coefficient a.

### How do you write a parabola equation?

Just as a quadratic equation can map a parabola, the parabola’s points can help write a corresponding quadratic equation. Parabolas have two equation forms – standard and vertex. In the vertex form, y = a(x – h)2 + k, the variables h and k are the coordinates of the parabola’s vertex.

What are the steps to graph a parabola?

To graph the parabola, connect the points plotted in the previous step. The graph in this example will look like a U. Connect the points using slightly curved (rather than straight) lines. This will create the most accurate image of the parabola (which is at least slightly curved throughout its length).

## What is the general formula for a parabola?

The general formula of a parabola with a vertical axis is derived using the focus point and the B. distance formula. The standard formula of a parabola is expressed as (x-h)^2 = 4a(y-k) or (y-k)^2 = 4a (x-h).

How to find a parabola?

Find the vertex. We’ll discuss how to find this shortly. It’s fairly simple,but there are several methods for finding it and so will be discussed separately.

• Find the y y -intercept,(0,f (0)) ( 0,f ( 0)).
• Solve f (x) = 0 f ( x) = 0 to find the x x coordinates of the x x -intercepts if they exist.
• Make sure that you’ve got at least one point to either side of the vertex. This is to make sure we get a somewhat accurate sketch.
• Sketch the graph. At this point we’ve gotten enough points to get a fairly decent idea of what the parabola will look like.