In a number line, the numbers on the right hand side of zero are all positive numbers (1, 2, 3, 4, ...). On the left hand side of zero are all negative numbers (-1, -2, -3, -4, ...). The numbers in the coordinates of the number line are all real numbers. Thus, the answer is letter A.
According to the Ruler Postulate, the set of points on any line correspond to real numbers.
The ruler postulate establishes that the points in a line can be paired with numbers that are real. It is the absolute value of the difference between the numbers that represent the distance between two points. So in simple terms, the ruler postulate allows mathematicians to know the distance of two separated points.
Thomas Jefferson probably handled foreign and domestic policies the best due to the Louisiana purchase. Hope this gives a little skeleton for your short paragraph! :)
