Please help will give you brainliest
2 answers:
Answer: Option A
Step-by-step explanation:
Given two variables X and Z, it is said that there is a correlation between X and Z if both variables change together.
That is, if when the variable X increases the variabl Z increases also then there is a positive correlation
if when the variable X increases the variable Z decreases then there is a negative correlation.
Now observe the graphs that are shown in the image. Note that in both cases the points are scattered and there is no clear relationship between the variables. Therefore the correlation is zero in both cases
Examples of strong positive and negative correlations are shown in the attached image
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Approximated: 
cm
Exact:
or 
Explanation:
It's always best for these types of questions to visualise it. A right triangle has base angle of 90°. Mark in what you know, and leave out the rest. Notice how the question doesn't ask for a hypotenuse. This means that you might be using the tangent function as the tangent function also doesn't require a hypotenuse.
So now, you have a side of 12cm, with the corresponding 39° angle marked.
To find the missing length, you can use the tangent function to approximate the length:
(opposite/adjacent)
Now, isolate the variable, x:
(exact form)
cm (approximated to 1 decimal place)
Exact:
Explanation:
It's always best for these types of questions to visualise it. A right triangle has base angle of 90°. Mark in what you know, and leave out the rest. Notice how the question doesn't ask for a hypotenuse. This means that you might be using the tangent function as the tangent function also doesn't require a hypotenuse.
So now, you have a side of 12cm, with the corresponding 39° angle marked.
To find the missing length, you can use the tangent function to approximate the length:
Now, isolate the variable, x: