When looking at attendance data for the 2014-2015 school year, a principal graphed number of tardies. x, a student had when compared to their grade point average y. The principal found the correlation coefficient to be R= -0.94.

There is a strong or weak relationship between the number of tardies and the GPA?
The slope of this graph is positive or negative?

We need to remember that the limits for this correlation coefficient are

So then for the firt question:

Since the |r| =0.94 and is near to 1 we can ensure that we have a strong relationship between the two variables of interest

And for the second question:

The slope for this case would be negative since if one variable increase the other decrease (that represent the negative value for r)

Step-by-step explanation:

For this case we are comparing the number of tardies. x, a student had when compared to their grade point average y.

We alo know that the correlation coefficient between the two variables using this formula:

And for this case

We need to remember that the limits for this correlation coefficient are

So then for the firt question:

Since the |r| =0.94 and is near to 1 we can ensure that we have a strong relationship between the two variables of interest

And for the second question:

The slope for this case would be negative since if one variable increase the other decrease (that represent the negative value for r)

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation:

im with everythinglos so yeahhhhh

step-by-step explanation: