No. of car and no. of accidents in the city

Price and sale of vehicle

Rainfall and production of car

Advertising and sales

Both variables change in the same direction

The graph is a horizontal line

Both variables change in the opposite direction

Sign of the correlation coefficient is negative

Both variables change in the same direction

Both variables change in the opposite direction 

The graph is a horizontal line

Sign of correlation coefficient is negative.

$\mathrm{r}=0$

$\mathrm{r}=\pm 1$

$\mathrm{r}=0.2$

None of these.

$\mathrm{r}=0$

$\mathrm{r}=\pm 1$

$\mathrm{r}=0.1$

$\mathrm{r}=2$

Perfect positive correlation 

Perfect negative correlation

No correlation

None of these

Possible

Sometimes possible

Not possible

None of these

Correlation coefficient

Regression coefficient

Both

None of these

$\sqrt{0.2}$

$-\sqrt{0.2}$

0.45

0.63

1

-1

0

-0.6