Figure 2 shows that as the rate of MCV1 coverage increases, there is a corresponding decrease in the incidence rate of measles worldwide.

Figure 2 indicates that as the rate of MCV1 coverage increases, the incidence rate of measles decreases on a global scale.

whihc one is better pick one

Both sentences convey the same meaning and are grammatically correct. It ultimately depends on your personal preference or the style you are aiming for.

It is generally accepted that a higher rate of MCV1 coverage is better as it leads to a corresponding decrease in the incidence rate of measles worldwide.