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If the number in front of the x squared is negative, then the parabola will open upwards. The opposite occurs when the number is positive.

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Q: When the parabola concave downward and upward?
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When you can tell the graph of quadratic function concave upward or downward?

If the sign of the term involving x2 is positive then it is concave upward, provided everybody agrees what concave upwards means. Just like y=x2 is concave upwards.


What is the definition of inflection point in math?

That's a point where the curve of a graph changes from "concave upward" to "concave downward", or vice versa.


What you call the point when a curve changing from concave upward to concave downward?

The point when a curve changes from concave upward to concave downward is called the inflection point. It is the point where the curve transitions from being curved "upwards" to being curved "downwards" or vice versa. At the inflection point, the rate of change of the curve's curvature changes sign.


What would you want to be a parabola open upward or open downward?

It can be either depending on its minimum value or its maximum value


Why is any parabola that opens upward or downward a function?

It is a function because for every point on the horizontal axis, the parabola identified one and only one point in the vertical direction.


Is concave mirror in shape of parabola?

no concave mirror is in shape of concave mirror


if the parabola open upward a is?

positive.


How do you know if a parabola opens up or down?

I think it's like this: x2+3x-5 So if the x2 part is a positive then it opens upward but if it's negative it goes downward.


The parabola opens downward the vertex is called?

The maximum.


A movie is made showing successive frames for an object accelerating downward. If the sequence is run backward would the object accelerate upward or downward?

UPWARD UPWARD UPWARD


What way does the parabola open if a is greater than 0?

If a is greater than zero then the parabola opens upward.


What is the opposite of downward?

Upward.