Which in percent is larger? losing weight from 100lb to 90 lb or 50lb to 40lb

When only separate discreet points are graphed it is called?

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!