The positive linear correlation is present in the scatter plot option first “positive” is correct.
<h3>What is the line of best fit?</h3>
A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.
We have given a scatter plot in the picture.
As we can see in the scatter plot the dots are not so close that the correlation between x and y will be weak.
If we draw a line of best fit the slope of the line will be positive, the correlation will be positive.
Thus, the positive linear correlation is present in the scatter plot option first “positive” is correct.
Learn more about the line of best fit here:
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X= 7 squared
Answer:
the blue piece of yarn is shorter than both the red yarn which is equal to the yellow piece of yarn:4/12<3/4=6/8
Step-by-step explanation:
<span>x² + 6x = -9
</span><span>x² + 6x + 9 = 0
</span><span>
(x + 3)(x + 3) = 0
x = -3
</span>
Answer:
35
Step-by-step explanation:
At the beginning, the ratio number of girls : number of boys is
(1)
where
G is the number of girls
B is the number of boys
Later, seven more girls join the class, and two boys drop the class, so the new numbers of girls and boys are
and
We are also told that now the ratio is
Substituting the two equations above,
(2)
Also, from eq.(1) we can write
And substituting into (2) and re-arranging, we can find B:
And so
Therefore, the total number of students in the class BEFORE is
And so, after we have:
So the new number of students is