how to find statistics?

I WANT TO KNOW HOW TO SOLVE THIS:if A=(2,5), B=(3,5) , find the length of AB

I don't think there is even a need to use the distance formula. The length of AB is 1.

This is geometry. You can graph it on a piece of graph paper and it will make sense immediately.If point A is at coordinate (2,5) and point B is at coordinate (3,5), then the y's are equal, so AB is a horizontal line, so simply subtract the x values: x2-x1= 3-2 = 1