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Mathematics 7 Online
zarkam21:

help

zarkam21:

1 attachment
zarkam21:

@Vocaloid

zarkam21:

@Vocaloid

zarkam21:

@Zepdrix

zarkam21:

@pooja195

zarkam21:

@Vocaloid

Vocaloid:

@angle if you could double check me on this one that would be appreciated ;; non-rigid implies that the graph is being stretched or shrunk, which eliminates c/d and there's no vertical transformation so...a? the answer a doesn't seem exactly right either

Angle:

The terminology for what it means to be "stretched horizontally" versus "stretched vertically" is vague. Because technically the graph is doing both. Therefore, in order to pick between A and B you need to understand the difference between "stretched horizontally" and "stretched vertically". Here is a picture I found that describes this: |dw:1512439717619:dw|

Angle:

From the picture we can see that: - Stretching horizontally Does Not change the y-intercepts, but Does change the x intercepts - Stretching vertically Does change the y-intercepts, but Does Not change the x intercepts Now let's see how the given equation changes when we fiddle with the number where the (3) is... y-1 = -(x+1)^2 has y-intercept at y = 0 and x intercepts at x = -2, 0 y-1 = -(2x+1)^2 has y-intercept at y = 0 and x intercepts at x = -1, 0 y-1 = -(3x+1)^2 has y-intercept at y = 0 and x intercepts at x = -2/3, 0 So with this, we can see that the y-intercept is Not changing, but the x-intercepts Are So this graph is being Horizontally stretched

Angle:

@Vocaloid is correct

zarkam21:

I'm sorry had to go for a little bit is it a?

Angle:

yup :D

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