Hi I’m Charles from the University of Alaska Mathematics Department. I have a degree in dentistry, chemistry, zoology, algebra, geometry and finally literature. Anyways I was very interested by your question so I took a look and saw that this indeed is a hard question. However when I look at it it doesnt look to bad but it could pose to be quite difficult. So assuming from the question I could tell that you need to define the square root untill you hit the zero degree of -2. But you could instead solve for negative externalities of the equations and then use the Calvin formula to solve this question. So ultimately the answer is A. I hope this helps!
From the observation of the dispersion graph it is concluded that the answer to this question is option D. r = -0.5.
The correlation coefficient "r" is a measure of the linear relationship between two random variables.
When the correlation is positive, the value of "r" is between 0 and 1. This means that when one variable increases the other too.
When the correlation is negative, the value of "r" is between -1 and 0. This means that one variable decreases as the other increases.
When there is no correlation the value of "r" is 0
In this case, the dispersion chart shows that the variable "y" decreases as the variable "x" increases. Therefore the value of "r" must be negative. Of all the options, the only one that presents a value of negative r is option D:
r = -0.5
Answer:
c equal 11.40 Step-by-step explanation: c is the hypotenuse so under square root 9^2 +7^2
