Which phrase best describes a scatter plot in which the variables are correlated with r = 0.79?

a.) weak negative association
b.) weak positive association
c.) strong negative association
d.) strong positive association

D.) strong positive association

Step-by-step explanation:

The given correlation coefficient

Since its polarity is positive then it must represent a positive association.

We know that if the r value is closer to +1 or -1 then it tells that there is a stronger linear relationship between the two variables.

Also it lies between 0.5 to 1 i.e. 0.5 < 0.79 < 1, therefore it must represent a strong positive association between the two variables.

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is