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Assuming that a is the leading coefficient of the equation of the parabola, changing it from positive to negative will reflect the parabola along a horizontal line through its minimum - which will then become its maximum.

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9y ago
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8y ago

It turns the parabola upside down.

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Q: What does changing the value of a from a positive number to a negative number cause a parabola to do?
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What does changing the value of a from a negative number to a positive number cause the parabola to do?

open upward


When the parabola concave downward and upward?

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.


Why does the expression -a does not always represent a negative number?

* If "a" is positive, "-a" is negative.* If "a" is negative, "-a" is positive. * If "a" is zero, "-a" is zero. If you want to force a negative number, you can write -|a|, i.e., the negative of the absolute value.


What are the rules fr multiplication and divisions of integers?

(positive number) x (positive number) = positive number (positive number)/(positive number) = positive number (positive number) x ( negative number) = negative number (positive number)/( negative number) = negative number (negative number) x (negative number) = positive number (negative number)/(negative number) = positive number


What does a negative number multiplied by a negative number equal to?

A positive number. Positive Number x Positive Number = Positive Number Positive Number x Negative Number = Negative Number Negative Number x Negative Number = Positive Number


Does a positive number times a negative number equal a negative or a positive number?

A negative number. A positive number x a positive number = a positive number A negative number x a negative number = a positive number A positive number x a negative number = a negative Hope this helps :D


Does changing the number of protons in a atom make an ion?

No, if you change the number of protons in an atom you will be changing the element. Changing the number of electrons turns it into an ion, either positive or negative


How do you work out how to times a positive number by a negative number?

A positive number times a positive number will always get you a positive number A negative number times a negative number will always get you a positive number (same signs will get you a positive number) but A positive number times a negative number will always get you a negative number or A negative number times a positive number will always get you a negative number (different signs will get you a negative number)


When you multiply a negative number by a positive number is the number positive or negative?

The result of multiplying a positive number by a negative number is a negative number.


Determine in which direction the parabola opens y equals x2-7x plus 18?

A parabola opens upwards if the quadratic coefficient - the number before the "x2" is positive; downward if it is negative. Note that x2 is the same as 1x2.


When you divided a negative number by a positive number witth the answer be positive or negative?

A negative divided by a positive is negative. A negative divided by a negative is positive. A positive divided by a positive is positive. A positive divided by a negative is negative.


What is a negitaive times a positive?

A negative number times a positive number will give you a negative product.A negative number times a positive number will give you a negative product.A negative number times a positive number will give you a negative product.A negative number times a positive number will give you a negative product.