Line Plots · Medium problem

Ana measured some leaves, in inches: $\dfrac{1}{4}, \dfrac{3}{4}, \dfrac{1}{2}, \dfrac{3}{4}, \dfrac{1}{4}, \dfrac{3}{4}, 1, \dfrac{1}{2}, \dfrac{3}{4}$. She makes a line plot of the lengths. How many more X's will be above $\dfrac{3}{4}$ than above $\dfrac{1}{2}$?