Hello everyone=) I have couple questions from my homework. I will be happy if someone can help me with them:
1) The points on a scatterplot lie very close to the line whose equation is y = 2 − 5x. The correlation between x and y is close to
A. 2
B. -5
C. -1
2)For a biology project, you measure the weight in grams and the tail length in millimeters of a group of mice. The correlation is r = 0.7. If you had measured tail length in centimeters instead of millimeters, what would be the correlation?
(There are 10 millimeters in a centimeter.)

A. 0.7/10 = 0.07
B. 0.7
C. (0.7)(10) = 7

Question

Hello everyone=) I have couple questions from my homework. I will be happy if someone can help me with them:	
1) The points on a scatterplot lie very close to the line whose equation is y = 2 − 5x. The correlation between x and y is close to
A.	2
B.	-5
C.	-1
2)For a biology project, you measure the weight in grams and the tail length in millimeters of a group of mice. The correlation is r = 0.7. If you had measured tail length in centimeters instead of millimeters, what would be the correlation?
(There are 10 millimeters in a centimeter.)
	
A.	0.7/10 = 0.07
B.	0.7
C.	(0.7)(10) = 7

anonymous · Answer

Ie to say if the scatterplot line was plotted, the gradient of that line would be similar to the y = 2 - 5x one. If the gradient of y = 2-5x is -5, thus gradient of scatterplot would be ~~ -5.

Correlation will not change with units

anonymous · Answer

thank you!