1. Direction of the parabola can be determined by
the value of a
. If a is positive, then the parabola faces up (making a u shaped). If a is negative, then the parabola faces down (upside down u).
How do you know if a hyperbola is vertical or horizontal?
A
horizontal hyperbola has its transverse axis at y = v
and its conjugate axis at x = h; a vertical hyperbola has its transverse axis at x = h and its conjugate axis at y = v.
How do you know if a parabola is vertical or horizontal?
If the x is squared
, the parabola is vertical (opens up or down). If the y is squared, it is horizontal (opens left or right). If a is positive, the parabola opens up or to the right. If it is negative, it opens down or to the left.
What is a vertical parabola?
The squaring of the variables in the equation of the parabola determines where it opens: When the x is squared and y is not, the axis of symmetry is vertical and the parabola opens up or down. For instance,
y = x
2
is a vertical parabola; its graph is shown.
How do you know if parabola is up or down?
There is an easy way to tell whether the graph of a quadratic function opens upward or downward:
if the leading coefficient is greater than zero, the parabola opens upward
, and if the leading coefficient is less than zero, the parabola opens downward.
How do you know if a parabola is wide or narrow?
A large positive value of a makes
a narrow parabola; a positive value of a which is close to 0 makes the parabola wide. If a<0 in f(x)=ax2+bx+c, the parabola opens downward. … Again, a large negative value of a makes the parabola narrow; a value close to zero makes it wide.
Is the focus always inside the parabola?
The focus of a parabola is
always inside the parabola
; the vertex is always on the parabola; the directrix is always outside the parabola.
How do you find the horizontal hyperbola?
The standard equation for a hyperbola with a horizontal transverse axis is
– = 1
. The center is at (h, k). The distance between the vertices is 2a. The distance between the foci is 2c.
What is vertical and horizontal?
The terms vertical and horizontal often describe directions:
a vertical line goes up and down
, and a horizontal line goes across. You can remember which direction is vertical by the letter, “v,” which points down.
What is the orientation of the hyperbola?
First of all, we know it is a
horizontal hyperbola
since the x term is positive. That means the curves open left and right.
How do you know if the directrix is vertical or horizontal?
The directrix is perpendicular to the axis of symmetry of a parabola and does not touch the parabola. If the axis of symmetry of a parabola is vertical, the directrix is a
horizontal line
. If we consider only parabolas that open upwards or downwards, then the directrix is a horizontal line of the form y=c .
What is the formula for a vertical 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.
Is a vertical line?
| 1. What is a Vertical Line? | 7. FAQs on Vertical Line |
|---|
What does a parabola equation look like?
The standard equation of a parabola is
y
2
= 4ax
. The axis of the parabola is the x-axis which is also the transverse axis of the parabola. The focus of the parabola is F(a, 0), and the equation of the directrix of this parabola is x + a = 0.
What is p value in parabola?
The key is the P value. If the parabola is f(x) = a ( x – v)
2
+h, the P value is
P = 1/(4a)
. The P value is both the distance from the vertex (v,h) to the focus and the distance from the vertex to the directrix.
