If the trend line on a scatter plot has a negative slope, what does this indicate about the relationship between the two variables?

As one variable increases, the other variable also tends to increase.

As one variable increases, the other variable tends to decrease.

There is no clear relationship between the variables.

The value of one variable is always double the other.

Which statement best describes a well-drawn line of fit?

It must pass through the very first and very last data points.

It should be as close to all the data points as possible.

It must be perfectly horizontal or vertical.

It must connect at least half of the data points directly.