Which shows a rational number plotted correctly on a number line? A number line going from negative 20 to negative 10 in increments of 2. There are 4 equal spaces between each number. Negative StartFraction 39 Over 2 EndFraction is plotted on the mark 1 space to the right of negative 20. A number line going from negative 10 to positive 4 in increments of 2. There are 4 equal spaces between each number. Negative 6.5 is plotted halfway between negative 6 and negative 4. A number line going from negative 6 to positive 2 in increments of 2. There are 4 equal spaces between each number. Negative one-half is plotted on the mark 1 space to the right of 0. A number line going from negative 5 to positive 3 in increments of 1. Negative 2.5 is plotted halfway between negative 2 and negative 1.