# Geometric Interpretation: The Sign of a Product

## The product of two positive numbers.

In the following, points and start out with and .
What do you notice about the coordinate of point ? In other words, is positive or negative? How do you know?

## The product of a negative and a positive number.

In the above, move point so that and make sure .
Is positive or negative? How do you know?

## The product of two negative numbers.

Move points and so that and . Is positive or negative? How do you know?

## The product of a positive and a negative number.

Move point so that . Move point so that . Is positive or negative? How do you know?

Positive * Positive =

Negative * Positive=

Negative * Negative=

Positive * Negative