OpenStudy (anonymous):

3 years ago
OpenStudy (anonymous):

The table below shows the air temperature, in degrees Celsius, and the number of snowboards sold in Amy's store: Temperature (degrees Celsius) (x) 1 -1 -2 -3 0 -4 2 Number of snowboards sold (y) 10 24 31 38 17 45 3 What is the correlation coefficient for the data and what does it represent? 0; it represents no correlation between x and y 1; it represents a perfectly linear positive correlation between x and y 1; it represents a perfectly linear negative correlation between x and y -1; it represents a perfectly linear negative correlation between x and y

3 years ago
OpenStudy (anonymous):

@Asevilla5 @satellite73

3 years ago
OpenStudy (anonymous):

@amistre64

3 years ago
OpenStudy (anonymous):

@Bookworm14

3 years ago
OpenStudy (anonymous):

@stefrheart

3 years ago
OpenStudy (anonymous):

I'm thinking A but i'm not positive

3 years ago
OpenStudy (amistre64):

3 years ago
OpenStudy (anonymous):

I don't understand what you're asking

3 years ago
OpenStudy (amistre64):

when we have a set of data, we can develop a linear model by some fancy stats calculating

3 years ago
OpenStudy (stefrheart):

Do you have a graphing calculator with you?

3 years ago
OpenStudy (anonymous):

No but I always use Desmos online

3 years ago
OpenStudy (amistre64):

can you have desmos give you a linear regression model?

3 years ago
OpenStudy (amistre64):

excel can do it

3 years ago
OpenStudy (anonymous):

I figured it out. It's D. Thanks though! Can y'all help with another?

3 years ago
OpenStudy (stefrheart):

Desmos cannot do a linear regression line..

3 years ago
OpenStudy (anonymous):

Brenda made a scatter plot with the following data: Number of years (x) 6 2 4 7 1 9 3 8 5 Amount of radioactive sample (in grams) (y) 0.15625 2.5 0.625 0.078125 5 0.01953125 1.25 0.0390625 0.3125 Which statement is correct about the scatter plot for the data? It will show a positive linear relationship between x and y. It will show a negative linear relationship between x and y. It will show a positive exponential relationship between x and y. It will show a negative exponential relationship between x and y. I'm thinking B, but I wanted to verify.

3 years ago
OpenStudy (amistre64):

3 years ago
OpenStudy (amistre64):

your first data set seems to be a linear all by itself

3 years ago
OpenStudy (anonymous):

So I am correct by answering B?

3 years ago
OpenStudy (amistre64):

define what a correlation coeff is

3 years ago
OpenStudy (amistre64):

how closely a best fit curve, fits the data

3 years ago
OpenStudy (amistre64):

id say its pretty close to 1 if it aint equal to it

3 years ago
OpenStudy (amistre64):

we have a negative slope ....

3 years ago
OpenStudy (stefrheart):

Are you finished?

3 years ago