The product of two positive rational numbers is greater than either factor. is sometimes true

It is sometimes true

Step-by-step explanation:

Fractions are positive rational numbers, and 2*1/2 is 1, which is less than 2. Here's a picture that might help.

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.