# How do you know the direction of a parabola?

## How do you know the direction of a parabola?

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 graph is up or down?

If a>0 then the Parabola will “Open Up”. If a<0 then the parabola will “Open Down”. Since in our Quadratic Equation, the coefficient of the x2 term is found to be >0 , the Parabola “Opens Upward”. Also observe that, if the Parabola “Opens Upward” then our Vertex will be a “Minimum” of the Quadratic Function.

How do you make a parabola move up?

The function y=x2+b has a graph which simply looks like the standard parabola with the vertex shifted b units along the y-axis. Thus the vertex is located at (0,b). If b is positive, then the parabola moves upwards and, if b is negative, it moves downwards.

### Does the parabola open up or down is the vertex a minimum or a maximum identify the axis of symmetry vertex and the of the parabola?

To find the min/max of a verticle parabola, take the opening of the parabola, either up or down(up in this case). If the parabola opens upward, then the vertex is the min. If the parabola opens downward, then the vertex is the max.

Does the maximum open down?

When the parabola opens down, the vertex is the highest point on the graph — called the maximum, or max. Finding the maximum of a parabola can tell you the maximum height of a ball thrown into the air, the maximum area of a rectangle, the minimum value of a company’s profit, and so on.

In what direction is the hyperbola oriented?

Key Concepts

Standard Forms of the Equation a Hyperbola with Center
Orientation Transverse axis is horizontal. Opens left and right
Center
Vertices a units to the left and right of the center
Rectangle Use a units left/right of center b units above/below the center

## How do you know if it is a horizontal or vertical hyperbola?

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. You can see the two types of hyperbolas in the above figure: a horizontal hyperbola on the left, and a vertical one on the right.

What moves a parabola up and down?

The function y=x2+b has a graph which simply looks like the standard parabola with the vertex shifted b units along the y-axis. If b is positive, then the parabola moves upwards and, if b is negative, it moves downwards. Similarly, we can translate the parabola horizontally.

When a parabola opens upward the vertex is?

If the parabola opens up, the vertex represents the lowest point on the graph, or the minimum value of the quadratic function. If the parabola opens down, the vertex represents the highest point on the graph, or the maximum value. In either case, the vertex is a turning point on the graph.

### Is a parabola upward or downward?

Parabolas may open upward or downward and vary in “width” or “steepness”, but they all have the same basic “U” shape. The picture below shows three graphs, and they are all parabolas. All parabolas are symmetric with respect to a line called the axis of symmetry.

How do you plot a parabola?

Plot the parabola on the line graph. Plot the vertex, x-intercept and y-intercepts points on the graph with large dots. Connect the dots with one continuous u-shaped line and continue the lines to near the end of the graph. Draw an arrow at both ends of the parabola line to represent infinity.

What is a parabola that opens down?

Understanding Parabolas 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. The vertex is at (h, k). You have to be very careful.

## How do you calculate the focal point of a parabola?

The formula for a parabola is: y = x² ÷ (4 × p) where p is the distance from the bottom of the parabola to the focal point, and x and y are cartesian coordinates of points along the parabola.