What lesson is parabola?

What lesson is parabola?

Parabola is the graph of a quadratic function and has an axis of symmetry which is the vertical line through the vertex of the parabola. A parabola may have at most two x-intercepts and exactly one y-intercept. A parabola can be concave up it opens up or concave down if it opens down.

How do you solve parabolas?

How to find a parabola’s equation using its Vertex Form

  1. Step 1: use the (known) coordinates of the vertex, (h,k), to write the parabola’s equation in the form: y=a(x−h)2+k.
  2. Step 2: find the value of the coefficient a by substituting the coordinates of point P into the equation written in step 1 and solving for a.

What is the formula for 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 are the 4 key features of a parabola?

Characteristics of Parabolas

  • Identify the vertex, axis of symmetry, y -intercept, and minimum or maximum value of a parabola from it’s graph.
  • Identify a quadratic function written in general and vertex form.
  • Given a quadratic function in general form, find the vertex.

What is a parabola in physics?

We define a parabola as the locus of a point that moves such that its distance from a fixed straight line called the directrix is equal to its distance from a fixed point called the focus. Unlike the ellipse, a parabola has only one focus and one directrix. The vertex of the parabola is at the origin.

What is a math parabola?

parabola, open curve, a conic section produced by the intersection of a right circular cone and a plane parallel to an element of the cone. The vertex of the parabola is the point on the curve that is closest to the directrix; it is equidistant from the directrix and the focus.

How do you solve an equation of a parabola?

The equation of the parabola, with vertical axis of symmetry, has the form y = a x 2 + b x + c or in vertex form y = a(x – h) 2 + k where the vertex is at the point (h , k).

How does a parabola equation work?

If the leading coefficient is positive, then the parabola opens upward. All quadratic equations of the form y=ax2+bx+c y = a x 2 + b x + c have parabolic graphs with y-intercept (0, c). However, not all parabolas have x intercepts….The Graph of a Quadratic Equation.

y-intercept: (0, −1)
Extra point: (2, −1)

How do you find the standard equation of a parabola?

If a parabola has a vertical axis, the standard form of the equation of the parabola is this: (x – h)2 = 4p(y – k), where p≠ 0. The vertex of this parabola is at (h, k). The focus is at (h, k + p). The directrix is the line y = k – p.

How do you find the equation of a parabola from a graph?

What are the 4 key features of a quadratic function?

Refresher: a quadratic function is a function that takes the form f(x)=ax2+bx+c and creates a parabola (U shape) when graphed. When discussing quadratic functions, certain terms will pop up a lot such as: concavity, vertex, parabola, axis of symmetry, minimum, maximum, and zeros.

What are some key features of parabola?

If the parabola opens upward, then the vertex is a minimum point and its y-value is the minimum value of the function. If the parabola opens downward, then the vertex is a maximum point and its y-value is the maximum value of the function. The graph is symmetrical about a vertical line, called the axis of symmetry.