Which statement accurately describes how to reflect point A (1, 1) over the y-axis?

Mathematics

2 answers:

densk [106]3 years ago

6 0

Step-by-step explanation:

This are the answers idk which one it is tho

Citrus2011 [14]3 years ago

4 0

Answer:

$A(1,1)\to A'(-1,1)$

Step-by-step explanation:

The rule for reflecting a given point (x,y) over the y-axis is $(x,y)\to(-x,y)$ .

That means we reflect a given point over the y-axis by negating the x-coordinate of the given point.

If one of the options is "negate the x-coordinate of the preimage", then this is the correct option.

If you have: $A(1,1)\to A'(-1,1)$ among the options, then it is the correct answer.

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skelet666 [1.2K]

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3 years ago

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Mashcka [7]

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Step-by-step explanation:

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3 years ago

What is the equation written in vertex form of a parabola with a vertex of (9, -1) that passes through (7. 7)?

rewona [7]

Answer:

$y = 2\, (x - 9)^{2} - 1$ .

Step-by-step explanation:

If the vertex of a parabola is $(h,\, k)$ , there would exist a constant $a$ ( $a \ne 0$ ) such that the following would be an equation for this parabola:

$y = a\, (x - h)^{2} + k$ .

The equation above is in the vertex form.

In this question, the vertex of this parabola is $(9,\, -1)$ . (Such that $h = 9$ and $k = -1$ .) Therefore, the equation of this parabola in the vertex form would be:

$\text{$y = a\, (x - 9)^{2} + (-1)$ for some $a \ne 0$}$ .

It was also given that the point $(7,\, 7)$ is on the parabola. In other words, if $x = 7$ and $y = 7$ , the equation of this parabola ( $\text{$y = a\, (x - 9)^{2} + (-1)$}$ ) should be satisfied. In other words: