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Dafna11 [192]
3 years ago
9

Which phrase best describes the association between variables X and Y?

Mathematics
1 answer:
Akimi4 [234]3 years ago
8 0

Answer:

"moderate positive association"

Step-by-step explanation:

Variable X is given in the x-axis and Variable Y is given in the y-axis

We say both variables have "positive" correlation when one increases and the other increases as well (and vice versa).

We say both variables have "negative" correlation when one increases and the other decreases (and vice versa).

When we move towards right in the x-direction, if y values (points) increase as well, so that is positive correlation.

Now, <em>Looking at the graph, as we move right, we see that the points (mostly) increase in y-axis as well, so definitely there is POSITIVE CORRELATION.</em>

<em />

<em>But are they perfect or moderate??</em>

<em />

A perfect correlation would be a line with slope very close to 1 or 1. X values would match y values. There is a moderate positive correlation when the slope would be a little less (maybe less than 0.8).

Looking again at the graph, we certainly can say that the points are not PERFECTLY POSITIVELY CORRELATED, so that would be a <em><u>"moderate positive association/correlation".</u></em>

The last answer choice is right.

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Given that th<span>e coordinates of the vertices of △DEF are D(2, −1) , E(7, −1) , and F(2, −3) and the coordinates of the vertices of △D′E′F′ are D′(0, −1) , E′(−5, −1) , and F′(0, −3) .

Notice that the y-coordinates of the pre-image and that of the image are the same, which means that there is a reflection across the y-axis.

A refrection across the y-axis results in the change in sign of the x-coordinates of the pre-image and the image while the y-coordinate of the image remains the same as that of the pre-image.

A refrection across the y-axis of </span>△DEF with vertices D(2, −1) , E(7, −1) , and F(2, −3) will result in and image with vertices (-2, -1), (-7, -1) and (-2, -3) respectively.

Notice that the x-coordinate of the final image △D′E′F′ with vertices <span>D′(0, −1) , E′(−5, −1) , and F′(0, −3) is 2 units greater than the vertices of the result of recting the pre-image across the y-axis.

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5 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
Find the missing term and the missing coefficient 6a −( )5a =( ) a2 − 35a
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 Let the missing coefficient be Y
 Therefore, (6a – X)5a = Y(a^2) – 35a
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Y = 30; X = 7
   Therefore, (6a-7)5a = 30 a^2 – 35a <span>
</span>
3 0
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