Observe the graph:

The scatter plot at the right represents the number of DVD players sold from to .

a.

Find the data represents a positive, negative or no relationship between the year and the

number of players sold.

Let represents number of DVD sold from year and represents the number of players sold.

As increases and increases.

Data in scatter plot shows a no relationship.

b.

What appears to be the trend between and , and .

Since and is DVD sold from year increases and he number of players sold increaes.

and DVD sold from year increases and he number of players sold decreaes and then increases.

Here, the relationship represents the negative.

c.

What factors could contribute to the trend displayed in the scatter plot.

The scatter plot at the represents the relationship between two variables, and .

increases and increases then it has positive relationship.

a.

It has positive relationship.

b.

and is DVD sold from year increases and he number of players sold increaes.

and DVD sold from year increases and he number of players sold decreaes.

c.

increases and increases then it has positive relationship.