Which way will the parabola open? Explain.

2 answers:

8 0

Our parabola open downward and therefore a is negative.

Explanation:
As value of a changes from positive to negative or from negative to positive, the direction of opening changes. For negative values of a we got negative parabolas that open downward. As the original formula y = x^2 we see that x^2 will always be positive because when you square a number it always gives positive value. Therefore the direction for which it will open, depends on value of a.

xeze [42]3 years ago

8 0

Answer:

The parabola is vertical (opens up or down).

Step-by-step explanation:

If the x is squared or 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).

- Hope this helps!

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Write down the possible values of x.x is an interger.

Simora [160]

Answer:

-1, 0, 1, 2, 3

Step-by-step explanation:

To answer this you have to understand 2 main things

These are: the symbols and what an integer is.

An integer is simply a whole number. For example: 1, 10, 3 etc.

The symbols, <= (first symbol) and < (second symbol) are very important. These tell us the range X is in.

<= means less than or equal to.

< means less than.

So we can write: -1 is less than or equal to x and x is less than 4.

If we follow this and also keep in mind we only want whole numbers then we can see the lowest X can be is -1 and the highest it can be is 3 since it has to be less than 4.

Then it is also everything inbetween them which is:

-1, 0, 1, 2, 3

5 0

3 years ago

-3-9 would the answer be positive or negative

dalvyx [7]

Answer:

the answer would be negative, because when you subtract -3-9 you get -12

Hope I helped :)

7 0

3 years ago

The value of y varies directly with x If x equals 3 than y equals 21 what is the value of c when the value of y equals 105